Thread: Shadow Help?
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# 10 22-03-2011 , 11:55 AM
LauriePriest's Avatar
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Join Date: May 2003
Location: London
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Hmmm,
Looks like you arn't using an image plane as your background.

Remember the use background shader will just query the current image plane as the basic color component for the surface with an alpha of 0 and then shoves everything else on top.

It doesnt do anythign with primary rays so if you have an image enviroment shoved on a card or sphere it will not get rendered.

A better way to use this shader would be to render a pass with primary visibilty turned off on everything except the use background shader which will mean you will get nothing but your shadow and reflection contributions as a seperate pass. Then just layer your car beauty on top and your BG image below in comp.

There is no real need to render everything at once, make use of render layers to preview the result before comp.


FX supervisor - double negative