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Old 08-05-2004, 09:49 AM   #1
nirsul
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Default Billboard casting shadows problem

Hi

I am using a billboard for a tree and using the regular alpha chammel technique for the transparency but no matter what I did - the plane still casts shadows upon an object which is behind the plane.

This is inside Mental Ray - Does anyone have a clue ?

NIR
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Old 08-05-2004, 09:54 AM   #2
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attached the image:
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Old 08-05-2004, 02:55 PM   #3
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can't say I've used Mental Ray, but usually using raytrace shadows works for that. not sure if MR does it differently.
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Old 08-05-2004, 03:01 PM   #4
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I am not sure it is a bug but I tried every trick I know and some others and still. Fimnally I had to put the tree as a post process in PS.

Thanks
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Old 08-05-2004, 03:11 PM   #5
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This is the image, unless the client requests a cange it will be the final one.

NIR
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Last edited by nirsul : 10-05-2004 at 11:24 AM.
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Old 10-05-2004, 10:13 AM   #6
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Still couldn't find out the solution in MR but in Maya Software Renderer it is corrected by using a zero value in Shadow Attenuation (Shader Raytracing Options)

This is a crucial issue for me !

NIR :-(
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