According to the H21 Update Karma XPU supports "shadow linking". I have a scene with a background asset, a hero asset and a big diffuser asset. I don't want the background asset to recieve shadows from the diffuser asset. Is this possible to achieve with shadow linking, and if so, where can I set it? I could not find it in the "render geometry settings" node.
Karma XPU now supports shadow linking for up to four geometry subsets per scene. Shadow linking means that only a subset of a geometry will contribute to the object's shadow.
I'm not sure you can do that with shadow linking to me shadow linking looks like you can decide which objects do or do not cast shadows from a particular light or collection of lights not necessarily which objects cast shadows onto which other objects
so if you exclude your diffuser from any light it will not cast shadows from that light to any objects, not just to your background
you can also do -shadow in Render Visibility if you don't want it to cast shadows at all from any light
Ah okay thank you people, then I got this mixed up. I already tested it using light linker and the render visibility -shadow setting, but as Tomas pointed out those settings will result in either the hero asset not recieving shadows from my diffuser, or the background not recieving any shadows.
Now that I think about it, maybe there is a way to do it by combining multiple light linker / render visibility settings, with duplicates of my light sources to achieve the result.
