Very nice!

I tried contributing all of my $40 worth of Brave BAT currency (earned from ads) via contribution button in Brave. However it seems I can not as i'm treated with the following message: "This creator is unable to receive contributions from Gemini"

According to https://donate.torproject.org/cryptocurrency/ it doesn't seem like they support BAT at all.

Fair enough. I tried.

Swapping is (should be?) trivial.

You may even be able to give it directly to a contributor.

Love this idea!

I think you should add an intro to procedural graphics chapter that goes over raymarching and other algorithms used to create meshes procedurally.

Hmm, pretty neat - will have to save this little tool for Game Jams.

Wouldn't use for a serious project then?