I am trying to get my head around on how to do this without compositing:
in the VFB i have a background loaded to preview my renders.
I have a rect light casting patches of light and shadow onto my object (with vray shadow catcher)
I need to see how the objects shadow is affecting the background (shadow of object)
at the same time i DON´T want my shadow caster to add other shadows on the background image. I only want to see the object shadow.
For now i would think this is not possible without duplicating the light or floor mesh, right and use light linking or something along those lines?
I was hoping to find an include exclude set somehwere to have more granular control over what affects the shadow matte.
if you’re not familiar with light/shadow linking, here’s a tip. I hate using the relationship editor to do this, so make buttons on your shelf to “Make shadow-link”, “Break shadow-link”, “Make light-link” and “break light-link”.
You can find those options under the lighting/shading menu, just make buttons out of them. much simpler than the relationship editor.
I used light linking a few times, shadow linking was new to me.
Hope vray supports this feature. Otherwise i might be able to do what i need with a shadow select pass…thanks for the tip with the Buttons. Will try this today
You could do it with the LightSelect (shadow) pass or LPEs; however, you would still need to do some light/shadow linking, because there’s no way to extract only a certain object’s cast shadows (only the shadows that fall on it).
