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.

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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.

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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/

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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.

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> sploinky.webm

In motion, with just GI and wildly different lights, the filter fails pretty noticeably. I might have to brush up my denoiser knowledge and have a look into the current state of the art approaches.

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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.

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