Perhaps you can use a texture like granite and define a color map that has the
colors change in transparency with the clock variable.   Have your functions be
circular / continuous and it will loop smoothly.
You could even simultaneously do that with the runes themselves.

You could also "cheat" and find an existing animation of smoke with an alpha
channel, splay it out into separate frames, and have PovRay render those
overlaying your runes.

So many ways to skin this cat.

Post a reply to this message