I have an animated fire shader (works in stills, too), in my file cabinet here.

https://sites.google.com/site/bagginsbill/file-cabinet

It's the fire4.mt5. There's an AVI movie you can see it in action.

You put it on one or more props. The general shape of the prop controls where the flames appear, but not the exact shape of the flames. The flame shape is defined by the shader itself.

In the AVI file, I used a few Poser spheres, overlapping, to make that render.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)