Exhibit 99.4
                    LETTER OF TRANSMITTAL AND ELECTION FORM
 
                                ---------------
 
                             Letter of Transmittal
            To Accompany Certificates Representing Common Shares Of
                              Discreet Logic Inc.
                                      and
                      Election Form For Holders Who Wish
                       To Receive Exchangeable Shares Of
                Discreet Logic Inc. Following The Amalgamation
 
  This Letter of Transmittal and Election Form is for use by holders of common
shares of Discreet who wish to receive New Discreet Exchangeable Shares in
connection with the proposed Amalgamation of Discreet, Autodesk Quebec and
Amalgamation Sub and certain related transactions. Discreet Shareholders are
referred to the Joint Proxy Statement/Prospectus (the "Proxy Circular") dated
February   , 1999 that was sent to you shortly prior to this Letter of
Transmittal and Election Form. Capitalized terms used but not defined in this
Letter of Transmittal and Election Form that are defined in the Proxy Circular
have the respective meanings set out in the Proxy Circular.
 
  This Letter of Transmittal and Election Form, properly completed and signed
in accordance with the instructions provided herewith, together with the
certificates for all of the Discreet Common Shares (which will be converted
automatically into New Discreet Class B Shares at the Effective Time) held by
the party completing this Letter of Transmittal and Election Form (the
"Certificates"), must be sent to Harris Trust Company of New York (the
"Depositary") at the appropriate address set forth below. In order to make an
effective election to receive New Discreet Exchangeable Shares, the completed
Letter of Transmittal and Election Form, accompanied by the holder's
Certificate(s) must be received by the Depositary no later than 4:29 p.m.
(Montreal, Quebec time) on the effective date of the Amalgamation. The
effective date of the Amalgamation is anticipated to be approximately three
business days after the Discreet Shareholders and Autodesk Stockholders
approve the Amalgamation and related transactions. Accordingly, you must act
promptly if you wish to receive New Discreet Exchangeable Shares in connection
with the Transactions. If the Transactions are not consummated, all
Certificate(s) will be returned to you by the Depositary as promptly as
practicable.
 
                                The Depositary:
 
                             HARRIS TRUST COMPANY
                                  OF NEW YORK
 

                                                
          By Hand or Overnight Courier:                                 By Mail:
         HARRIS TRUST COMPANY OF NEW YORK                   HARRIS TRUST COMPANY OF NEW YORK
           88 PINE STREET -- 19TH FLOOR                               P.O. BOX 1010
             NEW YORK, NEW YORK 10005                              WALL STREET STATION
                       USA                                    NEW YORK, NEW YORK 10268-1010
                                                                           USA

 
                         BOX A: CERTIFICATES DEPOSITED
- -------------------------------------------------------------------------------
 
 Please list in Box A all the Certificates representing Discreet Common Shares
 that you hold (all of which should be submitted with this Letter of
 Transmittal and Election Form). If there is not enough space below to list
 all of your Certificates, please attach a separate sheet. Use Box B to
 specify how many shares are covered by your Election. A separate Letter of
 Transmittal and Election Form should be submitted for shares registered in
 different names (see Instruction F.2). If you are unable to locate your
 Certificate(s), please contact the Depositary (See Instruction F.9).
 


- -------------------------------------------------------------------------------------------------------
    Name(s) and address of Registered Holder(s)
(Please fill in or make corrections needed if label
                    is affixed)                                      Certificates Enclosed
- -------------------------------------------------------------------------------------------------------
                                                      Certificate Number(s)*        Number of Shares*
- -------------------------------------------------------------------------------------------------------
                                                                                
                                                      -------------------------------------------------
 
                                                      -------------------------------------------------
 
                                                      -------------------------------------------------
 
                                                      -------------------------------------------------
 
                                                      -------------------------------------------------
                                                           Total Shares:
- -------------------------------------------------------------------------------------------------------
 
 
 *Need not be completed by shareholders delivering Discreet Common Shares by
Book Entry Transfer (see Instruction C)
 
 
                                       1

 
Ladies and Gentlemen:
 
  In connection with the Transactions, the undersigned hereby submits the
Certificate(s) referred to in Box A above, which currently represent Discreet
Common Shares and, upon the Amalgamation, will represent New Discreet Class B
Shares, and directs (the "Election") that each of such shares (or such lesser
amount of such shares as is indicated below) be exchanged for New Discreet
Exchangeable Shares as described herein, subject to proration as described in
Instruction B. It is understood that the following Election is subject to the
terms, conditions and limitations set forth in (i) the Proxy Circular, (ii)
the Acquisition Agreement appended as Appendix A to the Proxy Circular, (iii)
the Amalgamation Agreement appended as Appendix B to the Proxy Circular, and
(iv) the instructions contained herein, receipt of each of which is
acknowledged by the undersigned. It is further understood that the
undersigned's Election is subject to proration as described in Instruction B.
Accordingly, there can be no assurance that the undersigned will received the
amount of New Discreet Exchangeable Shares elected.
 
  The undersigned covenants, represents and warrants that (i) the undersigned
is the owner of the Discreet Common Shares being deposited, (ii) such shares
are owned by the undersigned free and clear of all mortgages, liens, charges,
encumbrances, security interests and adverse claims, (iii) the undersigned has
full power and authority to execute and deliver this Letter of Transmittal and
Election Form, and (iv) unless the undersigned shall have revoked this Letter
of Transmittal and Election Form by notice in writing given to the Depositary
not later than immediately following the Effective Time, the undersigned will
not, prior to such time, transfer or permit to be transferred any of such
deposited Discreet Common Shares. The covenants, representations and
warranties of the undersigned herein contained shall survive the completion of
the Amalgamation.
 
  The undersigned revokes any and all authority, other than as granted in this
Letter of Transmittal and Election Form or pursuant to any proxy granted in
connection with votes to be taken at the Discreet Meeting, whether as agent,
attorney-in-fact, attorney, proxy or otherwise, previously conferred or agreed
to be conferred by the undersigned at any time with respect to the Discreet
Common Shares being deposited. No subsequent authority, whether as agent,
attorney-in-fact, attorney, proxy or otherwise will be granted with respect to
the deposited Discreet Common Shares. Each authority conferred or agreed to be
conferred by the undersigned in this Letter of Transmittal and Election Form
shall survive the death or incapacity of the undersigned and any obligation of
the undersigned hereunder shall be binding upon the heirs, legal
representatives, successors and assigns of the undersigned.
 
  Upon request, the undersigned agrees to execute and deliver any additional
documents deemed necessary or desirable by Autodesk, Dutchco or the Depositary
to complete the exchange of the Certificate(s). If required by Instruction
F.4, the Certificate(s) submitted with this Letter of Transmittal and Election
Form are duly endorsed in blank or otherwise in a form acceptable for transfer
on the books of Discreet.
 
  By reason of the use by the undersigned of an English language form of
Letter of Transmittal and Election From, the undersigned shall be deemed to
have required that any contract evidenced by the Amalgamation as accepted
through this Letter of Transmittal and Election Form, as well as all documents
related thereto, be drawn exclusively in the English language. En raison de
l'usage d'une version anglaise de cette lettre d'envoi et formule de choix par
le soussigne, ce dernier est repute avoir demande que tout contrat atteste par
la fusion, qui est accepte au moyen de cette lettre d'envoi et formule de
choix, de meme que tous les documents qui s'y rapportent soient rediges
exclusivement en anglais.
 
  This Letter of Transmittal and Election Form is to be used either if
Certificate(s) are to be forwarded herewith or if delivery of Discreet Common
Shares is to be made by book entry transfer to an account maintained by the
Depositary at a Book Entry Transfer Facility (see Instruction C).
 
                                       2

 
  [_]Please check here if Discreet Common Shares are being delivered by book
    entry transfer made to an account maintained by the Depositary at one of
    the Book Entry Transfer Facilities, and complete the following (only
    participants in a Book Entry Transfer Facility may deliver Discreet
    Common Shares by book entry transfer):
 
    Name of Depositing Institution: _________________________________________
 
    Check Box of Applicable Book Entry Transfer Facility: [_] DTC [_] PDTC
 
    Account Number: _________________________________________________________
 
    Transaction Code Number: ________________________________________________
 
 
                 BOX B: ELECTION FORM FOR DISCREET SHAREHOLDERS
              WHO WISH TO RECEIVE NEW DISCREET EXCHANGEABLE SHARES
 
   The undersigned hereby elects to have the New Discreet Class B Shares into
 which the deposited Discreet Common Shares will be converted upon the
 Amalgamation represented by the above certificate(s) treated as follows:
 

               
  A.                  New Discreet Class B Shares redeemed for New Discreet
                      Exchangeable Shares. (please fill in the number of New
                      Discreet Class B Shares you elect to redeem for New
                      Discreet Exchangeable Shares. For every such New Discreet
                      Class B Share you will receive 0.33 of one New Discreet
                      Exchangeable Share, subject to proration).
  B.                  New Discreet Class B Shares converted into New Discreet
                      Units and immediately exchanged for shares of Autodesk
                      Common Stock. (please fill in the number of New Discreet
                      Class B Shares you elect to have converted into New
                      Discreet Units, which will immediately thereafter be
                      acquired by Dutchco in exchange for 0.33 shares of
                      Autodesk Common Stock).
  C.                  Total Number of Shares (Sum of (A) and (B), above)--This
                      number must equal the "Total Shares" entered at the
                      bottom of Box A.

 
   It is strongly recommended that US Holders who own Discreet Common Shares
 do not elect to receive New Discreet Exchangeable Shares since the ownership
 and disposition of such shares may have certain adverse tax consequences. For
 information as to the material Canadian and United States federal income tax
 consequences of an Election, see "Material Canadian Federal and United States
 Federal Income Tax Consequences" in the Proxy Circular.
 
                                ---------------
 
   The undersigned acknowledges that the failure to complete the above
 election will automatically result in the undersigned receiving Autodesk
 Common Stock if the Transactions are completed.
 
                                ---------------
 
                                       3

 
 
                      BOX C: SPECIAL PAYMENT INSTRUCTIONS
 
   Fill in ONLY if the check and certificate(s) are to be issued in a name
 OTHER than the name(s) appearing in Box A above. (If this Box C is filled in,
 then unless otherwise indicated in Box D, any check or certificate(s) issued
 in exchange for certificates representing Discreet Common Shares will be
 mailed to the address indicated in this Box C.
 
                     Register certificates in the name of:
 
 Name: ________________________________________________________________________
                                 (Please print)
 
 Address: _____________________________________________________________________
 
 
 ------------------------------------------------------------------------------
                                                     (Zip/Postal Code)
 
 ------------------------------------------------------------------------------
 (Social Security, Social Insurance or Taxpayer Identification Number of Person
                                  Named Above)
 
 
 
                      BOX D: SPECIAL DELIVERY INSTRUCTIONS
 
   Fill in ONLY if the check and certificate(s) are to be sent to an address
 OTHER than the address appearing in Box A above, or, if Box C is filled in,
 to an address OTHER than the address appearing in Box C.
 
                                    Mail to:
 
 Name: ________________________________________________________________________
                                 (Please print)
 
 Address: _____________________________________________________________________
                                                     (Zip/Postal Code)
 
 
 
       BOX E: REQUEST BY CANADIAN RESIDENT SHAREHOLDERS WHO ARE ELIGIBLE
                     FOR AND DESIRE A CANADIAN TAX DEFERRAL
 
   By checking the box below, the undersigned: (i) requests a tax election
 filing package; (ii) represents that the undersigned is an Eligible Holder
 (as defined in the Proxy Circular); (iii) acknowledges that it is the
 undersigned's responsibility to prepare and file the appropriate tax
 election(s) that will be included in the tax election package and send such
 documents to Montreal Trust Company of Canada, at its address at 6th Floor,
 1800 McGill Avenue, Montreal, Quebec, H3A 3K9, so that they are received by
 Montreal Trust Company of Canada no later than 90 days after the Effective
 Date; and (iv) acknowledges that a deferral is only available to the extent
 the undersigned receives New Discreet Exchangeable Shares in exchange for New
 Discreet Class B Shares. See "Material Canadian Federal and United States
 Federal Income Tax Consideration to Discreet Shareholders--Discreet
 Shareholders Resident in Canada--Rollover Transactions" in the Proxy
 Circular.
 
  [_]Please check if you want and are eligible for a tax election package
 
   Eligible Holders who are requesting a tax election filing package should
 check the appropriate box(es) below:
 


                                                             Yes No
                                                             --- ---
                                                           
      The undersigned is a Partnership                       [_] [_]
      The undersigned intends to file an election in Quebec  [_] [_]

 
 
                                       4

 
                                   SIGNATURES
                             (See Instruction F.2)
 
 ------------------------------------------------------------------------------
 
 ------------------------------------------------------------------------------
 (Shareholder(s) sign here and please complete substitute Form W-9 or Form W-8,
                      as applicable. See Instruction F.7)
 
 Dated: _______________________________________________________________________
 
   Must be signed by the registered holder(s) exactly as name(s) appear(s) on
 Certificate(s), or by person(s) authorized to become registered holder(s) by
 certificates and documents transmitted with this Letter of Transmittal and
 Election Form. If signature is by an agent, trustee, executor, administrator,
 guardian, attorney or others acting in a fiduciary or representative
 capacity, or by an officer of a corporation on behalf of a corporation,
 please set forth the full title and furnish appropriate supporting evidence
 (See Instruction F.5).
 
 Name(s): _____________________________________________________________________
 
 ------------------------------------------------------------------------------
                                 (Please print)
 
 Capacity (Full Title): _______________________________________________________
 
 Address: _____________________________________________________________________
                                                     (Zip/Postal Code)
 
 ------------------------------------------------------------------------------
                         (Area code and daytime phone):
 
                            Canadian Residents Only:
 
 (Social Insurance Number): ___________________________________________________
                                         (See Substitute Form W-8)
 
                               US Residents Only:
 
 (Tax Identification or Social Security Number): ______________________________
                                         (See Substitute Form W-9)
 
                              SIGNATURE GUARANTEE
                  (If Required--See Instructions F.3 and F.4 )
 
   SPACE BELOW IS FOR USE BY FINANCIAL INSTITUTIONS ONLY. FINANCIAL
 INSTITUTIONS: PLACE MEDALLION GUARANTEE IN SPACE PROVIDED BELOW.
 
 
                                       5

 
                        INSTRUCTIONS FOR COMPLETION OF
                    LETTER OF TRANSMITTAL AND ELECTION FORM
 
  This Letter of Transmittal and Election Form should be properly completed,
dated, signed and delivered, together with the stock certificates representing
Discreet Common Shares currently held by you, to the Depositary.
 
  This Letter of Transmittal and Election Form, and the Election you make
herein, are subject to terms and conditions set forth herein, in the Proxy
Circular which was sent to you shortly prior to this Letter of Transmittal and
Election Form and in the Acquisition Agreement and the Amalgamation Agreement,
which are appended as Appendixes A and B thereto, respectively.
 
  EACH HOLDER OF DISCREET COMMON SHARES IS STRONGLY ENCOURAGED TO READ THE
PROXY CIRCULAR IN ITS ENTIRETY AND TO DISCUSS THE CONTENTS THEREOF AND THIS
LETTER OF TRANSMITTAL AND ELECTION FORM WITH HIS OR HER FINANCIAL AND TAX
ADVISORS PRIOR TO MAKING THE ELECTION.
 
A. ELECTIONS
 
  Each holder of Discreet Common Shares will receive upon the Amalgamation one
New Discreet Class B Share for each Discreet Common Share then held by such
holder. Immediately following the Amalgamation, each such New Discreet Class B
Share will automatically, based upon whether the holder thereof has made a
valid Election to receive New Discreet Exchangeable Shares pursuant to this
Letter of Transmittal and Election Form, either (i) be redeemed by New
Discreet for 0.33 New Discreet Exchangeable Shares (subject to proration as
contemplated in Instruction B) or (ii) be converted into one New Discreet
Unit, which will immediately thereafter be acquired by Dutchco in exchange for
0.33 shares of Autodesk Common Stock, in either case without any further
required action on the part of the holder. A Discreet Shareholder's failure to
complete the election form in Box B or to return a completed Letter of
Transmittal and Election Form with all accompanying documents prior to the
Election Deadline will automatically result in such holder receiving Autodesk
Common Stock if the Transactions are completed.
 
B. PRORATION
 
  Pursuant to the Acquisition Agreement, the maximum number of New Discreet
Exchangeable Shares that may be issued in the Transactions cannot exceed
19.99% of the Discreet Common Shares outstanding immediately prior to the
Amalgamation, multiplied by 0.33 (the "Maximum Number"). In the event that the
aggregate number of New Discreet Exchangeable Shares requested by Discreet
Shareholders pursuant to valid Letters of Transmittal and Election Forms (the
"Aggregate Elected Amount") exceeds the Maximum Number, each holder making an
effective Election will receive, for each New Discreet Class B Share for which
such Election is made, (x) from New Discreet, a number of New Discreet
Exchangeable Shares equal to the product of 0.33 and a fraction, the numerator
of which is the Maximum Number and the denominator of which is the Aggregate
Elected Amount (such product, the "Prorated Amount"), and (y) from Dutchco, a
number of shares of Autodesk Common Stock equal to 0.33 minus the Prorated
Amount.
 
C. DELIVERY OF DISCREET COMMON SHARES BY BOOK-ENTRY TRANSFER.
 
  The Depositary will establish an account with respect to the Discreet Common
Shares at The Depositary Trust Company or the Philadephia Depositary Trust
Company (each, a "Book Entry Transfer Facility") for purposes of the
Transactions within two business days after the date the Proxy Circular is
mailed to Discreet Shareholders. Any financial institution that is a
participant in the Book Entry Transfer Facility's systems may make book entry
delivery of Discreet Common Shares by causing the Book Entry Transfer Facility
to transfer such Discreet Common Shares into the Depositary's account in
accordance with the Book Entry Transfer Facility's procedure for such
transfer. However, although delivery of Discreet Common Shares may be effected
through book entry transfer into the Depositary's account at the Book Entry
Transfer Facility, the Letter of
 
                                       6

 
Transmittal and Election Form, properly completed and duly executed, with any
required signature guarantees, or an Agent's Message (as defined below), and
any other required documents must, in any case, be transmitted to, and
received by, the Depositary prior to the Election Deadline. The confirmation
of book entry transfer of Discreet Common Shares into the Depositary's account
at the Book Entry Transfer Facility as described above is referred to herein
as a "Book Entry Confirmation." Delivery of documents to the Book Entry
Transfer Facility does not constitute delivery to the Depositary.
 
  The term "Agent's Message" means a message transmitted by the Book Entry
Transfer Facility to, and received by, the Depositary and forming a part of
the Book Entry Confirmation, which states that such Book Entry Transfer
Facility has received an express acknowledgment from the participant in such
Book Entry Transfer Facility tendering the Discreet Common Shares that such
participant has received and agrees to be bound by the terms of the Letter of
Transmittal and Election Form and that Autodesk may enforce such agreement
against the participant.
 
D. SPECIAL CONDITIONS.
 
 1. Revocation.
 
  You may revoke any Election or revoke any instruction in this Letter of
Transmittal and Election Form only by written notice, signed and dated by you,
to the Depositary. Such written notice must identify the name of the holder of
record of the Discreet Common Shares subject to such revocation and the serial
number shown on the Certificate(s) representing such shares. The written
notice must be received by the Depositary prior to the Election Deadline. If
an Election is revoked or any other instruction in your Letter of Transmittal
and Election Form is revoked prior to the Election Deadline, the
Certificate(s) for your Discreet Common Shares shall be promptly returned to
you. A subsequently dated, properly completed Letter of Transmittal and
Election Form relating to Discreet Common Shares for which a valid Letter of
Transmittal and Election Form and Certificate(s) has previously been received
by the Depositary will serve as both a revocation of the first Letter of
Transmittal and Election Form and a new Election. If you revoke your Election
and you fail to properly make a new Election prior to the Election Deadline,
you will receive shares of Autodesk Common Stock upon consummation of the
Transactions.
 
 2. Shares Held by Nominees, Trustees or other Representatives.
 
  Holders of record of Discreet Common Shares who hold such shares as
nominees, trustees or in other representative or fiduciary capacities (each, a
"Representative") may submit one or more Letters of Transmittal and Election
Forms covering the aggregate number of Discreet Common Shares held by such
Representative for the beneficial owners for whom the Representative is making
an Election, provided that such Representative certifies that each such Letter
of Transmittal and Election Form covers all of the Discreet Common Shares held
by such Representative for a particular beneficial owner. Any Representative
who makes an Election may be required to provide the Depositary with such
documents and/or additional certifications, if requested, in order to satisfy
the Depositary that such Representative holds such Discreet Common Shares for
a particular beneficial owner of such shares.
 
E. NO FRACTIONAL SHARES.
 
  No fractional shares of New Discreet Exchangeable Shares or Autodesk Common
Stock will be issued. In lieu of the issuance of any fractional shares
pursuant to the Transactions, a cash adjustment will be paid in respect of any
fractional share that would otherwise be issuable. The amount of such cash
adjustment will be the product of such fractional amount (after aggregating
all fractional shares to which a holder is entitled) and the average of the
closing prices of the Autodesk Common Stock on the Nasdaq National Market for
each of the thirty consecutive trading days immediately preceding the
Effective Time.
 
                                       7

 
F. GENERAL INSTRUCTIONS.
 
 1. Execution and Delivery
 
  This Letter of Transmittal and Election Form, or a photocopy of it, should
be properly completed, dated and signed, and should be delivered, together
with your stock Certificate(s) representing Discreet Common Shares to the
Depositary at the appropriate address set forth in this Letter of Transmittal
and Election Form. YOU MAY CHOOSE ANY METHOD TO DELIVER THIS LETTER OF
TRANSMITTAL AND ELECTION FORM AND ACCOMPANYING CERTIFICATES TO THE DEPOSITARY
(INCLUDING BY BOOK ENTRY TRANSFER); HOWEVER, YOU ASSUME ALL RISK OF NON-
DELIVERY. IF YOU CHOOSE TO USE THE MAIL, WE STRONGLY RECOMMEND THAT YOU USE
REGISTERED MAIL, RETURN RECEIPT REQUESTED, AND THAT YOU PROPERLY INSURE ALL
STOCK CERTIFICATES. DELIVERY OF THIS LETTER OF TRANSMITTAL AND ELECTION FORM
AND ACCOMPANYING STOCK CERTIFICATES WILL BE DEEMED EFFECTIVE AND RISK OF LOSS
WITH RESPECT TO SUCH LETTER OF TRANSMITTAL AND ACCOMPANYING CERTIFICATES WILL
PASS ONLY WHEN SUCH LETTER OF TRANSMITTAL AND ELECTION FORM AND ACCOMPANYING
CERTIFICATES ARE ACTUALLY RECEIVED BY THE DEPOSITARY (INCLUDING, IN THE CASE
OF A BOOK ENTRY TRANSFER, BY BOOK ENTRY CONFIRMATION).
 
 2. Signatures
 
  The signature (or signatures, in case the of Certificate(s) owned by two or
more joint holders) on this Letter of Transmittal and Election Form must
correspond exactly to the name as written on the face of the Certificate(s)
sent to the Depositary, unless the Discreet Common Shares have been
transferred by the holder of record. If there has been any such transfer, the
signatures on this Letter of Transmittal and Election Form should be signed in
exactly the same form as the name of the last transferee indicated on the
accompanying stock powers attached to or endorsed on the Certificate(s) (see
General Instruction 4 below). If there is insufficient space to list all or
your Certificates being submitted to the Depositary or to respond to any other
request for information, please attach a separate sheet.
 
  If Discreet Common Shares are registered in different names on several
Certificates, it will be necessary to complete, sign and submit a separate
Letter of Transmittal and Election Form for each different registration of
Certificates. For example, if some Certificates are registered solely in your
name, some are registered solely in your spouse's name and some are registered
jointly in the name of you and your spouse, three separate Letters of
Transmittal and Election Forms should be submitted.
 
 3. Checks and/or Certificates in Same Name
 
  If checks in payment of any fractional share interests and/or any new stock
certificates (representing either New Discreet Exchangeable Shares or Autodesk
Common Stock, as applicable) are to be payable to the order of and/or
registered in exactly the same name as inscribed on the surrendered
Certificate(s) (representing Discreet Common Shares), you will not be required
to endorse the old Certificates or make payment for transfer taxes or have
your signature guaranteed. For corrections in name or changes in name not
involving changes in ownership, see General Instruction 4(d).
 
 4. Checks and/or Certificates in Different Names.
 
  (IGNORE THIS INSTRUCTION 4 IF THE FIRST SENTENCE OF INSTRUCTION 3 APPLIES.)
 
                                       8

 
  If checks in payment of Fractional Shares and/or any new stock certificates
(representing either New Discreet Exchangeable Shares or Autodesk Common
Stock, as applicable) are to be payable to the order of and/or registered in a
different name from exactly the registered name inscribed on the surrendered
Certificate(s) (representing Discreet Common Shares), please follow these
instructions:
 
    (a) Endorsement and Guaranteee. The Certificate(s) surrendered must be
  properly endorsed or accompanied by appropriate stock power(s) properly
  executed by the record holder of such Certificate(s) to the person who is
  to receive the check or certificate representing either New Discreet
  Exchangeable Shares or Autodesk Common Stock, as applicable. The signature
  of the record holder on the endorsement(s) or stock power(s) must
  correspond with the name that appears on the face of the Certificate(s) in
  every particular and must be guaranteed by an Eligible Institution. If this
  General Instruction 4 applies, please check with your financial institution
  or brokerage firm immediately to determine whether it is an Eligible
  Institution or will need to help you locate an Eligible Institution. An
  "Eligible Institution" generally means a Canadian chartered bank, a major
  trust company in Canada, a member of a recognized stock exchange in Canada,
  a commercial bank or trust company having an office, branch or agency in
  the United States of America, a member of the Investment Dealers
  Association of Canada, a member of a national securities exchange in the
  United States of America, a member of the National Association of
  Securities Dealers, Inc. or a member firm of a recognized Medallion Program
  ((STAMP), (SEMP) or (MSP)). Notaries Public cannot execute acceptable
  guarantees of signatures.
 
    (b) Transferee's Signature. If a certificate has previously been properly
  transferred but the transfer has not yet been recorded on the books of
  Discreet, this Letter of Transmittal and Election Form must be signed by
  the transferee or by his agent and should not be signed by the transferor.
  The signature of such transferee or agent on this Letter of Transmittal and
  Election Form must be guaranteed by an Eligible Institution.
 
    (c) Transfer Taxes. In the event that any transfer or other tax becomes
  payable by reason of the issuance of a check in payment of any fractional
  shares and/or the issuance of any stock certificates for either New
  Discreet Exchangeable Shares or Autodesk Common Stock, as applicable, in
  any name other than that of the record holder, the transferee or assignee
  must pay such tax to the Depositary or must establish to the satisfaction
  of the Depositary that such tax has been paid. You should consult your own
  tax advisor as to any possible tax consequences resulting from the issuance
  of stock or cash in a name different from that of the holder of record of
  the surrendered Certificate.
 
    (d) Correction of or Change in Name. For a correction in name which does
  not involve a change in ownership, the surrendered Certificate(s) should be
  appropriately endorsed; for example, "James E. Brown, incorrectly inscribed
  as James S. Brown," with the signature guaranteed by an Eligible
  Institution. For a change in name by marriage, etc., the surrendered
  Certificate(s) should be appropriately endorsed; for example, "Mary Doe,
  now by marriage Mrs. Mary Jones," with the signature guaranteed by an
  Eligible Institution.
 
 5. Supporting Evidence.
 
  Where this Letter of Transmittal and Election Form is executed by a person
as an executor, administrator, trustee or guardian, or on behalf of a
corporation, partnership or association or is executed by any other person
acting in a representative capacity, this Letter of Transmittal and Election
Form must be accompanied by satisfactory evidence of authority to act. Any of
Discreet, New Discreet, Autodesk or the Depositary, in their discretion, may
require additional evidence of authority or additional documentation.
 
 6. Notice of Defects; Resolution of Disputes.
 
  None of Autodesk, Dutchco, Discreet, New Discreet and the Depositary will be
under any obligation to notify you or anyone else that the Depositary has not
received a properly completed Letter of Transmittal and Election Form or that
any Letter of Transmittal and Election Form submitted is defective in any way.
 
                                       9

 
  Any and all disputes with respect to Letters of Transmittal and Elections
made in respect of Discreet Common Shares (including but not limited to
matters relating to the Election Deadline, time limits, defects or
irregularities in the surrender of any Certificate, effectiveness of any
Election and computations or prorations or allocations) will be resolved by
Autodesk and its decision will be conclusive and binding on all parties
concerned. Autodesk will have the absolute right in its sole discretion to
reject any and all Letters of Transmittal and Election Forms and surrenders of
Certificates which are deemed by it to be not in proper form or to waive any
immaterial irregularities in any Letter of Transmittal and Election Form or in
the surrender of any Certificate. Surrenders of Certificates will not be
deemed to have been made until all defects or irregularities that have not
been waived have been cured.
 
 7. US Federal Tax Withholding.
 
  Under US federal income tax law, the Depositary is required to file a report
with the Internal Revenue Service ("IRS") disclosing the payments being made
to you as an exchanging shareholder. Federal law also requires each
shareholder to provide the Depositary with a correct Taxpayer Identification
Number ("TIN") on a Substitute Form W-9 enclosed with the Letter of
Transmittal and Election Form. If the Depositary is not provided with the
correct TIN, you may be subject to a $50 penalty by the IRS and payments that
are made to you with respect to surrendered shares may be subject to backup
withholding. For individuals, your TIN is your social security number. Your
TIN should be included in Part 3 of the Substitute W-9 form provided with the
Letter of Transmittal and Election Form.
 
  Certain shareholders (such as foreign persons) are not subject to back-up
withholding and reporting requirements. If you are exempt from backup
withholding, you should complete the Substitute W-9 to avoid possible
erroneous backup withholding. Enter your correct TIN in Part 3, write "EXEMPT"
in the block in Part 2 of the Substitute W-9, and sign and date the form. A
foreign person may qualify as an exempt recipient by submitting to the
Depositary a Form W-8 in lieu of the Substitute Form W-9, signed under
penalties of perjury, attesting to that individual's exempt status. A Form W-8
is included with this Letter of Transmittal and Election Form.
 
  If backup withholding applies, the Depositary is required to withhold 31% of
any payments to be made to you. Backup withholding is not an additional tax.
Rather, the amount of tax withheld will be applied as a credit against the tax
liability of persons subject to backup withholding. If withholding results in
an overpayment of taxes, a refund may be obtained by filing a tax return with
the IRS. The Depositary cannot refund amounts withheld by reason of backup
withholding.
 
  To complete the form if you do not have a TIN, write "Applied for" in the
space for the TIN in Part 3 and sign and date the form. If the Depositary does
not receive your TIN by the time of payment, backup withholding may apply. You
must also complete the Certificate of Awaiting Taxpayer Identification Number.
 
  To apply for a TIN, get Form SS-5, Application for a Social Security Card
(for individuals), from your local office of the Social Security
Administration, or Form SS-4, Application for Employer Identification Number
(for businesses and all other entities), from your local IRS office.
 
 8. Special Mailing Instructions.
 
  Any checks representing fractional share payments and certificates
representing stock consideration for surrendered Discreet Common Shares will
be mailed to the address of the holder of record as indicated in Box A
(Certificates Surrendered), unless instructions to the contrary are given in
Box D (Special Delivery Instructions).
 
 9. Lost Stock Certificates.
 
  If you are unable to locate the Certificate(s) representing your Discreet
Common Shares, contact the Depositary at (800) 313-7416. The Depositary will
instruct you on the procedures to follow. In order to make an
 
                                      10

 
effective Election with respect to the lost Certificate(s) and receive the
consideration provided for in the Acquisition Agreement, you will be required
to complete certain additional documentation and pay for an indemnity bond
covering the lost Certificate(s). The cost of this bond will be based on the
value of the Discreet Common Shares represented by the lost Certificates. IF
YOU HAVE NOT COMPLETED THE LETTER OF TRANSMITTAL AND ELECTION FORM, COMPLIED
WITH THE PROCEDURES FOR REPLACING LOST CERTIFICATES AND PAID FOR THE INDEMNITY
BOND PRIOR TO THE ELECTION DEADLINE, YOU WILL BE DEEMED TO HAVE MADE AN
ELECTION TO RECEIVE AUTODESK COMMON STOCK WITH RESPECT TO DISCREET COMMON
SHARES REPRESENTED BY THE LOST CERTIFICATE.
 
 10. Miscellaneous.
 
  As soon as practicable after the Election Deadline, the Depositary will
begin mailing and delivering stock certificates for New Discreet Exchangeable
Shares and/or Autodesk Common Stock in exchange for Certificates representing
Discreet Common Shares that have been received by the Depositary. There will
be a delay, however, if backup withholding pursuant to General Instruction 7
applies.
 
                                      11

 
  Additional copies of the Letter of Transmittal may be obtained from the
Depositary. For further information or assistance concerning the Letter of
Transmittal and Election Form, contact the Depositary at (212) 701-7624.
 
  Questions and requests for assistance or additional copies of the Proxy
Circular, Letter of Transmittal and Election Form and other materials relating
to the Transactions may be directed to the Depositary or the Information Agent
at the locations and telephone numbers set forth below:
 
                            The Information Agent:
                [LOGO OF GEORGESON & COMPANY INC. APPEARS HERE]
 
                               Wall Street Plaza
                           New York, New York 10005
                 Bank and Brokers Call Collect: (212) 440-9800
                   All Others Call Toll Free: (800) 223-2064
 
                                The Depositary:
 
                             HARRIS TRUST COMPANY
                                  OF NEW YORK
 

                                            
        By Hand or Overnight Courier:                             By Mail:
      HARRIS TRUST COMPANY OF NEW YORK                HARRIS TRUST COMPANY OF NEW YORK
        88 PINE STREET -- 19TH FLOOR                           P.O. BOX 1010
          NEW YORK, NEW YORK 10005                          WALL STREET STATION
                     USA                               NEW YORK, NEW YORK 10268-1010
                                                                    USA

 
                         Call Collect: (212) 701-7624
 
                                      12