home *** CD-ROM | disk | FTP | other *** search
-
-
- |==================================|
- | |
- | AUTODESK 3D STUDIO RELEASE 2 |
- | |
- | README.DOC |
- | |
- |==================================|
-
-
- This file contains information about 3D Studio Release 2 that
- became available after the documentation was printed. We recommend
- that you look over this information now, and then print this file
- and keep a copy with your Reference Manual. Later, when you're
- more familiar with 3D Studio, reread this document. Also, if you
- run into a problem with the program and can't find the solution in
- the Reference Manual, look again at the Readme.doc.
-
- In brief, this document covers the following:
-
- - If you are using Corel Draw version 2.01 to export nested
- polygons for import into the 2D Shaper, you must use a
- special process when exporting the geometry.
-
- - Third-party drivers designed to work with Autodesk 3D Studio
- release 1.0x may not work properly with Release 2.
-
- - Using inpoint with an external VTRADI driver and a drop-frame
- time-coded tape will cause a problem when using a dropped
- frame as an inpoint.
-
- - If you are using a network with 3D Studio, you must disable
- any parallel port redirection or 3D Studio won't be able to
- locate the hardware lock.
-
- - To use file transfer programs that use the parallel port
- (such as Flying Dutchman), you must first remove the hardware
- lock.
-
- - There is an undocumented 3ds.set parameter called Mirror-
- Clip-Any that affects the reflection properties of flat-
- mirror reflections.
-
- - Objects which are closer than the Z-Clip-Near setting will be
- clipped in the reflected image of automatic reflection maps.
-
- - Improper installation of external ADI drivers can cause
- unpredictable results.
-
- - When rendering to fields, double your segment time before
- creating a preview to properly analyze precise placement on
- field-specific keyframes.
-
- - If you have problems with memory management in 3D Studio, we
- recommend you obtain automated memory managers such as
- Quarterdeck QEMM and Qualitas 386-to-the-Max.
-
- - Render to fields for best results when rendering to video. If
- you can't, then use the Vblur.ixp program from Video Post
- to smooth the image. Never use Vblur.ixp when rendering to
- fields.
-
-
- COREL DRAW VERSION 2.01
-
- When nested polygons are exported from release 2.01 of Corel
- Draw as Adobe Illustrator (.ai) files, the program converts
- the curves into hundreds of closely spaced vertices with
- linear segments.
-
- Follow these steps when exporting text or nested objects to
- .ai format in Corel Draw 2.01:
-
- 1. Convert all text to curves. (Convert to Curves in the
- Arrange menu, or [Ctrl]-[V].)
-
- 2. Break apart any objects with nested holes. (Break Apart
- in the Arrange menu, or [Ctrl]-[K].)
-
- 3. Export the graphics normally, using the .ai filter.
- (Ignore the Convert Text to Curves option.)
-
- RELEASE 1.0X DRIVERS
-
- Third-party drivers designed for 3D Studio Release 1.0x (such
- as those made by Vibrant Graphics or Panacea) might not work
- properly with Release 2. Please contact the manufacturer of
- your driver for an upgrade.
-
- VTRADI DRIVERS AND DROP FRAME
-
- When using the external VTRADI driver and an NTSC tape using
- "Drop Frame" SMPTE time code, if you specify an "in-point" at
- a time code that does not exist on a "Drop Frame" tape, the
- results will be unpredictable. Set the in-point to any valid
- time code to avoid any problems (and we recommend using the
- standard SMPTE "Non-Drop Frame" time code method).
-
- HARDWARE LOCK
-
- If you are using 3D Studio on a network system, you must
- disable any parallel-port redirection, otherwise 3D Studio
- probably won't be able to locate the hardware lock. Consult
- your network documentation for information on how to disable
- parallel-port redirection.
-
- In order to use file transfer programs that use the parallel
- port (such as Flying Dutchman and LapLink), you must first
- remove the hardware lock.
-
- MIRROR-CLIP-ANY = NO
-
- This parameter affects the reflection of objects which
- intersect or surround flat-mirror reflection objects. It has
- no effect on other automatic reflections. When Mirror-Clip-
- Any is set to NO (the default) only those faces in an object
- that completely fall below the surface of a flat-mirror
- surface are clipped (not reflected). When this parameter is
- set to YES, all faces in an object that even partially fall
- below the surface of the flat-mirror surface are clipped.
-
- In almost all cases, leave this parameter set to NO. Here is
- one of the rare conditions in which you should set it to YES:
-
- You might have a flat-mirror object that is surrounded on
- it's non-mirror sides by a "shroud" (such as the prism head
- on a 35mm camera that surrounds the primary mirror inside of
- it). The mirrored side of the object is facing AWAY from the
- shroud, but under default conditions, at certain angles, the
- shroud appears reflected in the flat mirror even though it's
- behind the mirror. In this case, you want to turn off the
- reflection of the shroud, so set Mirror-Clip-Any to YES. Now,
- only those faces that are TOTALLY in front of the mirror will
- be reflected.
-
- The general rule here is: Leave this parameter set to NO,
- unless you see a reflection that should not appear, then try
- YES.
-
- AUTOMATIC REFLECTION MAPS AND CLOSE OBJECTS
-
- If an object with an automatic, non-flat reflection map is
- placed closer than the Z-Clip-Near distance from another
- object, that object will appear clipped in the reflection
- map. If you see pieces of an object missing in the reflection
- of a very close object, either lower your Z-Clip-Near value,
- or increase the overall scale of your scene so that the
- objects are greater than the Z-Clip-Near distance (in units).
-
- CONFIGURING ADI DRIVERS
-
- CAUTION: Improper installation of ADI drivers can cause
- unpredictable results in the operation of 3D Studio.
-
- Please read carefully the section, beginning on page 42 of
- your Installation and Performance Guide, that describes
- proper configuration of ADI drivers. It's important that you
- use the DOS set command to set the environment variables that
- 3D Studio checks. 3D Studio uses these environment variables
- to find the ADI driver when the driver is needed by the
- program. If you do not set an environment variable before
- starting 3D Studio and attempt to use an ADI device from
- within the program, the function of the program might be
- limited and unpredictable results might occur. If, while
- running 3D Studio, you plan to use an ADI device but realize
- that you have not set your environment variables, save your
- work, exit the program, and then set the variables as
- instructed in the Installation and Performance Guide before
- returning to the program.
-
- PREVIEWING FIELD RENDERINGS
-
- If you are going to render an animation to fields instead of
- to frames, and you need to examine certain fields using the
- Preview/Make function in the Keyframer, you must temporarily
- scale the animation to double its size before making the
- preview flic. In this way, each frame of the preview flic
- represents a field instead of a frame.
-
- Use the following procedure to create a "field-accurate"
- preview flic:
-
- 1. After loading your animation, select Time/Scale Segment
- in the Keyframer and set the number of frames to twice
- that displayed in the "Scale to:" field.
-
- 2. Use Preview/Make to create the preview flic.
-
- Although the flic will not accurately play back the
- speed of the animation, each frame will correctly
- display the position of the objects for each field of
- the animation.
-
- 3. IMPORTANT: Reload the original .3ds file to restore the
- correct frame count before rendering your animation. For
- best results, do not use Time/Scale Segment to halve the
- number of frames back to their original total.
-
- This technique is only necessary when examining an animation
- which might have abrupt changes on a field. For example, if
- you are moving an object out of camera view with a linear
- Position key to make it "disappear."
-
- AUTOMATED MEMORY MANAGERS
-
- If you feel you're having memory problems while using 3D
- Studio, or can't properly shell out to external programs,
- reread the sections entitled "EMS and 3D Studio" and "Using
- CFIG386.EXE" in the Installation and Performance Guide.
-
- Your memory manager might require manual configuration to use
- various memory management schemes for different application
- programs.
-
- As noted in the Installation and Performance Guide, automated
- memory managers such as Quarterdeck QEMM and Qualitas 386-to-
- the-Max automatically reconfigure memory as needed by
- different applications. We highly recommend that you try
- these memory managers if you have any questions about your
- memory configuration.
-
- VIDEO RENDERING TIPS (FIELD RENDERING AND VBLUR.IXP)
-
- When rendering to NTSC or PAL videotape, you should render to
- fields 99 percent of the time. Field rendering increases the
- smoothness of motion and provides an extra level of
- antialiasing that you can't achieve by rendering to frames.
- Rendering by fields to videotape only appreciably increases
- rendering time when you're using automatic mirror reflection
- maps and shadows. (Note: Shadows are only calculated for the
- first frame of an animation if only the camera and non-
- shadow-casting lights are moving. Also, you can turn on the
- [First Frame Only] button in the Automatic Reflection Map
- dialogue box in the Materials Editor so that only the first
- frame of an automatic (cubic) reflection map is calculated.)
-
- If, for some reason, you decide to render to NTSC or PAL
- video with Render-Fields turned off, you can use the
- Vblur.ixp program within Video Post (with a recommended value
- between 0.6-0.8) to slightly blur the image on the vertical
- axis. Vblur.ixp also reduces some of the "ropiness" on edges
- and mitigates finely detailed moire patterns that wouldn't
- otherwise be smoothed when Render-Fields is off. You should
- also consider reducing your Texture-Blur value from 1.4-2.0
- to 0.7-1.2 so your textures don't appear too blurry.
-
- In summary, if you are rendering to NTSC or PAL video and
- want the highest quality of antialiasing with the most speed,
- and you are NOT using many automatic reflective objects or
- shadow-casting lights, you'd use:
-
- Phong shading
- High Anti-aliasing (4x4 sample)
- Anti-alias Threshold: 0
- Texture Blur: 1.2-2.0 range
- Filter Maps: On
- Turbo: On (unless you're using very detailed bump maps)
- Render-Fields: Yes
- Video Post: No image filtering from vblur.ixp.
-
- If you are using automatic reflection maps and shadow-casting
- lights (with moving lights and/or objects in the scene), you
- should compare your rendering speed using the above settings
- with the following settings:
-
- Texture Blur: 0.7-1.3 range
- Render-Fields: No
- Video Post: 0.6-0.8 image filtering from vblur.ixp.
-
- CAUTION: Never use Vblur.ixp with Render-Fields turned on.
- This causes flashing in the image because the two fields are
- filtered together.
-
- [End of Document]
-
-