Try

Some more screenshoots:   

Rework for probe-grid lod:  Now probes do have almost consistent distribution in screen-space with similar budget

Still working on secondary bounces. More screenshots:    

black-and-white version 

Metal backend also works now:  Not much FPS on M1, yet still happy that Metal-backed now has less bugs :)

Updated albedo-fetch heuristics:  Notes: albedo-fetch is a horrible hack that enables usage photo-texture of vanilla game, and attempts to extract usable color information

Working on narrowing down, what is not working. When similar view-angle rendered with `albedo=0.9` image look correct: 

Still tuning textures/color-bleeding. GI:  No-GI: 

Going thru https://physicallybased.info Sun (above atmosphere): 143'000.f -> 128'000.f Sun (on land): engine results in ~100.000f, matches real world observation Sky (median) was ~3% of sun-light (too low), after changing...

Main issue with GI (or lighting in general), when it comes to gothic, are materials. Or should I say - lack there of. GI (and diffuse lighting) needs albedo data,...