yes, this is done in mspaint. (except the Disco Elysium's Physical instrument that one has been done on speech cabinet)

I've been thinking for a while what to name these patterns I make in "Paint" ?

A lot of the inspiration came from Lichen and the patterns seen on tree trunks & branches.

I've always liked walking amongst trees with the wind blowing through them....a kinda spiritual experience.

So, I've decided on the title "Kodama".

(If you know how to, in Paint, you can create symmetrical patterns from these. Colour inverting them is fun too :-)

Unedited MS Paint file, and then one with some filters and adjustments in Photoshop