Thanks! It took half of year to build it, it was a hard task especially for a newbie Rust programmer I was back in the day. I was able to find right desing from fourth attempt.
There is also https://liberapay.com/mrDIMAS - see the right panel on the rg3d repo. AFAIK it should be better than patreon because it doesn't take any cut but for some reason people are not using it.
I can also vouch for this perspective as, I remember RG3 (and I am Canadian, btw :) ) and thought of him when I saw the name (or rather sounded it out). So definitely non-zero. Just my 2 cents. I like this engine also, just to be clear :)