opensoldat
Descent explosion
I know that popular 'explode.gif' that's been on "free graphics" websites in the 90s had been used in Soldat since the start, and is currently still present in a modified, upscaled form. The old gif had been made from Descent sprite rips so there's still some 1994 copyrighted baggage from that.
All I can suggest for resolving this, is rendering a new set of explode .pngs in Blender using a quick 'smoke' simulation, though it's a bit difficult to recreate good 'pyromania' quality results with it...
It's been a while, but I would like to resolve this before releasing 1.8. I looked into it, and it's plain as day that the animation is from Descent: https://www.youtube.com/watch?v=SuMBYZrcQfU&t=142s
The source code to Descent 1 was released under a license allowing for non-commercial use, but AFAICT the assets were never released.
Contributions would be very welcome. I'm experimenting with Blender to see what I can come up with, but I'm really a novice at this stuff. Also appropriately licensed assets such as those found at opengameart.org are an option to look into.
