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As promised, the 2D SDF can also work as collision for particles. Toggle collision on in particles and it just works.
AMD renders groups in blocks of 16x32, and uses subgroups of 64 pixels, preferably (but most often not) aligned to 8x8.
Every model has 300k triangles. Also being rendered with 4 shadow cascasdes.
Without LOD: 23.7ms
With LOD: 2.5ms
Pretty nice performance win!
Since many asked for 3D models to test auto LOD, I tried to get some 3D models from @Sketchfab. It's difficult to find good quality models, downloadable and for free, so here it is what I could find...
A flythrough an open world with the real-time GI. Still some small details to adjust, but almost there..
Kept working on the new SDFGI today and solving the remaining leaks/occlusion issues, now its near perfect. The quality of this appears to be so good that I'm beginning to refuse believing that this is working. It's probably broken and looks correct because of a bug.