- Currently there can be max. 3 stationary lights (or 1 dynamic light which is probably more experimental). The clouds absorb the light, so I guess this can be considered as self-shadowing.
- Do you mean Decals in the sense of large object shadows? I mean, there is a distance field, so a Decal could be rendered at a specific position (though the direction / normal of the nebula is not given by the distance field). To put a texture / UV around the surface (making some kind of mesh + UV) - I don’t think this is easily possble.
Best
Lee