When i finished rendering i show you a video i made with yafaray.

There is a animated texture (fire) that lightens the enviroment.
What would be great is when light-emitting-textures shoot out photons for caustics.

With a controler where you can control from wish intensity of the texture (white = most intensive) the photons will come from.

Another way could be:
Make it possible to use textures on lamps as it work in blender ;)
I could use the same texture on the lamp to use it for semi-real caustics ;)

I know, not much people would need this feature so i set the priority to minor.

In my video i simulated the causics from the fire with an area-light (so i could animate the intensity of the caustics).
Normaly the caustics should move, becaus the fire is moving- but animating the light is to hard while using much frames!

Greets,
Dennis F.

(video link will come soon)

edit:

Video is online now!

http://www.youtube.com/watch?v=Mxz-yZNBXcE

(reuploaded)

It seems that there are caustics from the fire, or are this other kinds of reflections?

I rendered a single frame with some little modifications- looks like caustics- i would need a way to make them more intensive without increasing the emit-value of the fire (in this fram emit=20).