3 posts / 0 new
Last post
ForumImport
Offline
Last seen: 9 years 10 months ago
Joined: 09/22/2009 - 18:47
RenderMan Volume Shader

I would like to fill a box with a smoke/have that partially attenuates light. I think I need to use RenderMan Volume Shader? I cannot figure out from the RenderMan Volume Shader user document how to use it. I would be very appreciative if someone could let me know if I start out with a polycube, how do I then apply the RenderMan Volume Shader? Cheers.

ForumImport
Offline
Last seen: 9 years 10 months ago
Joined: 09/22/2009 - 18:47
RenderMan Volume Shader

a yahoo search turned up this link, as i wanted to know more about it too
http://www.k-3d.org/forums/topic/renderman-volume-shader

ForumImport
Offline
Last seen: 9 years 10 months ago
Joined: 09/22/2009 - 18:47
RenderMan Volume Shader

Volume shaders are assigned to geometry through a material, just like any other shader. So if you take a look at the "RenderManMaterial" that is created by default in new documents, you'll see that it has Atmosphere, Interior, and Exterior shaders where you can specify volume shaders that affect light before it reaches the surface (Exterior), while it moves through an object (Interior), and after it leaves the object and reaches the camera (Atmosphere).
A disclaimer: I don't know of any RenderMan implementation that supports Interior or Exterior shaders. Aqsis and Pixie support Atmosphere shaders.
Cheers,
Tim

Log in or register to post comments