ramis
11-21-2002, 10:32 PM
Hi!
I'm trying to do a render of an object to composite it over a background using matte/shadow planes to get the shadow, see attached image...
The problem is that when I render with light tracer (advanced lighting), the matte/shadow material doesn't work... as you can see, light tracer puts illumination on the background planes too, so the alpha channel is wrong and the image can't be composed over another image.... The alpha channel should have only the box and its soft shadow...
Could anyone help me?
Thanx!
Ramiro
I'm trying to do a render of an object to composite it over a background using matte/shadow planes to get the shadow, see attached image...
The problem is that when I render with light tracer (advanced lighting), the matte/shadow material doesn't work... as you can see, light tracer puts illumination on the background planes too, so the alpha channel is wrong and the image can't be composed over another image.... The alpha channel should have only the box and its soft shadow...
Could anyone help me?
Thanx!
Ramiro