Just a quick FYI to the lumen team: the surface cache is still absolutely destroyed by the enabling of r.RayTracing.Nanite.Mode 1. I’m not going to claim to know what’s causing it, but it is interesting that a change in geometry is causing issues, given that the surface cache is projection-based and can facilitate variable surface representations.
Normal surface cache
r.RayTracing.Nanite.Mode 1. Note the strange ‘fragments’ of cache representation.
Normal lighting
Extremely strange indirect lighting.