INFO: SunRise and SunSet Shaders
  
PSS ID Number: Q184928
Article last modified on 04-30-1998
 
IRIX:3.7,3.71; WINNT:3.7,3.71
 
IRIX winnt
 

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The information in this article applies to:
 
 - SOFTIMAGE 3D for IRIX, versions 3.7, 3.71
 - SOFTIMAGE 3D for Windows NT, versions 3.7, 3.71
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SUMMARY
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This article provides a few tips for using the SunRise and SunSet Shaders.
 
 - Make sure that your ground object is very large so that it reaches the
   horizon of your scene. As a reference, position a circle in the XZ plane
   and scale it to the far plane of your camera (default 32768). From here
   you can see if your ground plane object is large enough to reach the
   horizon. If not, gaps appear that get worse as you raise the camera.
   Also, set Altitude to -0.6; this helps remove black horizons.
 
 - It makes no difference if you move the sphere for the atmosphere shader
   on the y-axis. You can use Rendermap to convert it to a bitmap, apply it
   as a normal 2D texture, and either drop the sphere down, or use Paint to
   remove any offending areas. If the shader has animated parameters, this
   solution does not work.
 
REFERENCES
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If you have any questions concerning the information contained in this
article, contact support@softimage.com by e-mail.
 
Additional query words: si si3d si3dren
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Keywords          : si si3d si3dren
Version           : IRIX:3.7,3.71; WINNT:3.7,3.71
Platform          : IRIX winnt
Issue type        : kbinfo
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Copyright Microsoft Corporation 1998.