Wow! I thought only scrap-heap-foraging-blacksmiths used spark testing on a
regular basis. But you say you do it as an occupation. I guess I just learned
something!

I've only had limited experience in this field (only to the extent of
differentiating between mild steel, driveshafts, and files). I could imagine
that this would be difficult to capture on film. At the same time, however, to
render an image that is not just a pretty picture, but conveys accurate info
would in my opinion take a some work as well. The one advantage you'd have is
(relative) complete control over the composition and lighting of your picture.
As such, my humble suggestions would be:
	1. If you haven't used POV (or whichever renderer you choose) expect to
invest some time in familiarizing yourself with the program.
	2. Lay out exactly what you want to depict (e.g.. the trajectory of the
spark, how and where it "bursts", angles, distances). This way, someone else
can give you better advice on modeling should you need it.
	3. For modeling, (at least for POV) think in terms of solid 3D shapes:
spheres, cones, cylinders etc., and leave the glow and color for later.

If you are really serious, and continue to have questions, keep asking the
people on this group - it's a GREAT resource, and has helped me a lot!

Abe

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