Props on Fire

Trying my own approach at a "burning object" effect. System adapts to almost any convex geo that is not too thin, by sampling positions and normals. I wanted a nice fire visual (sim done in pFD) but also a system that could adapt to a bit of movement, hence the whole "loosely attached axis-aligned billboard" solution, instead of going with a more traditional "free rotating screen-aligned billboard" one. Was a bit of a challenge, but I kinda like the end result.