Microsoft KB Archive/170168

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Microsoft Knowledge Base

HOWTO: Render a Shadow Pass

Last reviewed: June 20, 1997
Article ID: Q170168

The information in this article applies to:

  • Softimage 3D for IRIX, versions 3.5, 3.51
  • Softimage 3D for Windows NT, versions 3.01, 3.51

SUMMARY

This procedure shows you how to create shadow effects in a scene:

  1. From the matter module, choose Atmosphere -> Ambience and change the RGB values to 0,0,0.
  2. Hide all the lights (choose the Hide command) except the one that you want to produce the shadows.
  3. Select the light and change the RGB values to its negative equivalent (i.e.: so, 1,1,1 becomes -1,-1,-1).
  4. Choose Light -> Edit and change the Umbra Intensity and Penumbra Factor to their negative equivalent.

The rendered frames should be black with white shadows.

If you have several light sources, render each shadow separately and mix them in composite. You can then render all the lights with a -1 setting and modify the opacity in composite.

REFERENCES

If you have any questions concerning the information contained in this article, contact support@softimage.com by e-mail.


Keywords : kbgraphic si si3d si3dlits si3dren kbhowto

Version : 3.01 3.50 3.51
Platform : IRIX NT WINDOWS


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Last reviewed: June 20, 1997
©1997 Microsoft Corporation. All rights reserved. Legal Notices.