VFB channel shadow

V-Ray for Rhino V-Ray for Rhino :: General
1

Hello,
please can someone explain how the shadow channel works. I have tested but cannot get it to work. If I create a simple scene with say box on a plane/ground and render I get shadows. So I go into VFB and add the shadow and then render again. I would expect to see the shadows in the shadows channel?

I guess I am doing something wrong, can anyone help please?

Thanks

2

Re: VFB channel shadow

try to choose channels in vfb output or output file vray-raw

3

Re: VFB channel shadow

The shadow channel will only compute the shadow information from a light source (ie an area light, spotlight, point light, direct light). In the case of putting a box on a plane, you don’t have an actual light source, just GI, which won’t compute shadows.

4

Re: VFB channel shadow

Thanks Dalomar,
That makes sense. Thought I could render the GI shadows.

Thanks

Rich

5

Re: VFB channel shadow

I don’t believe there is actually such a thing as GI shadows. The whole reason why the shadow channel works is because there is a direct light source that they can be traced from. With GI, there’s no real light source, so its kinda just more or less light thats received from the scene. Thats my take on it though.