Water caustics

One of the hardcore scenes to test. Forgive me the noise but my bvh is so slow :(.

Cheers.

A little update

Hi there,

What's new:

• Added Beer's law to the glass material - you can tell how absorption varies with the distance traveled (for ex. monkey's ear is barely colored versus it's middle).
• Pixel filtering - added variety of filters. The black border around the light source is due the negative values of mitchell filter.
• Reimplemented simple bvh and .obj parser.

Btw. could somebody tell me:

when I specify my light intensity with pure rgb triplet as its emittance, for ex. (15, 15, 15) - what units are those? And how could I convert between other, perhaps more physically convenient, units? so I could compare my results with other renderers.

Cheers.