Adding bluenoise is a guaranteed success, it seems.
Now you can even see that the sphere in the box is actually glowing. There is even some nice light bleeding out of the box 🥺
Next up: 🥔 -filtering for _just_ the GI. I also need to add a GUI for configuring all the magic variables.
Hehe yeees, most important UI element is working already, the pass-time graph.
Also: The background is the full image, not just GI. But I need to remove the hard-coded ambient term, since I got actual GI now.
Alright, I fixed the whole direct vs. indirect light ordeal, it seems.
I love how the (fake) soft shadows actually look as if they were traced with multiple rays as well.
I use the improved soft shadow tracing described on IQ's blog here: https://iquilezles.org/articles/rmshadows/
Some simple filtering even makes low-light conditions _kind of work_.
Right now I'm rejecting pixels based on a normal and depth/positional divergence parameter.
It ain't fancy, but works for now.
Managed to get the luminosity criteria working, which makes the denoiser much stabler when moving the camera.
However, now the low-light situation is more grainy😭 .
Cool thing is, I managed to half the GI-trace render time by changing the GI-Cache layout (from linear to tiled with the same size as my work-groups are). So that's a win 👍 . I'm now at 12ms - 14ms for a 3 bounce trace, at 3440x1440 for the GI pass.
Siebencorgie
troy_s 
Metin Seven 🎨