It would have been nice to see even one example scene which would have demonstrated indirect lighting more clearly, something like this one (linked from the article) https://vimeo.com/214264003 where you can nicely see the blue/red tint on the white floor.

edit: oh, apparently bounce lights are bit of a kludge here, from github readme:

> To bounce light, the previous frame is referenced and emissive surfaces from that frame are added to the current frame. This means every frame, light bounces to one additional surface.

Randomly, I think I may have been the first person to do (or at least write about) 2D GI. I taught a bunch of people about it (and rendering / path tracing in general), some of whom became a lot more popular.

Here's the oooold and very cringy article I wrote as a teen in the 90s, there are some old crap images in the gallery: https://web.archive.org/web/20031207162649fw_/http://www.cfx...

Read the article on desktop, have to say that at least there it's really nice: good color scheme, readable text, good writing, nicely chosen images and code snippets (also Godot is always fun to encounter).

Makes me wish that more of my own articles could be so pleasant. It's unfortunate that the same experience doesn't seem to carry over to mobile devices, but oh well.

https://www.rykap.com/2020/09/23/distance-fields/

The website isn't readable on mobile which is doubly sad because it's a very cool article.