TURBO MODE https://turbowarp.org/498554851/fullscreen?turbo Work in progress, incomplete. This is a photon mapper, but it doesn't work well yet, and the gathering method is currently very cheap. My next version will add refraction and caustics (possibly also volumetrics), the version after that will add glassy reflections.
Don't tell me the image is dark and gets overexposed over time, I know. I created a much better and actually mathematically correct screen-space collection system on KA. For now, I'm focusing on the hard part and will implement the better gathering method in the final version I will post to @piano_miles.