A free model by the amazing artist Ansel Hsiao (fractalsponge.net). All Octane except for the comped in background stars.

Here's a cut down version of one of the 3drender.com scenes.

Same thing, just bigger.

Sure Radiance. I'll email you at your info address. Kpan is attached to my junk email account. Want to keep my name separate (you never know what those spammers are up to).

At first I wanted to feature the texture on the cube but it doesn't work without bump, so we get the floor instead...

BTW, you guys at refractive software have a great product here. I never liked unbiased renderers before Octane.

Playing with our new toy.

Hi Pedro, Here I have done a specular test on the floor. The floor has a glossy material with diffuse image in one channel and specular image in the specular channel.

I get really good depth on all of those. I think I like the piano keys best.

I was thinking maybe dispersion and caustics are related in a physically based renderer since both things are caused by refraction of light. Often times caustics show some dispersion. But I'm way out of my league here.

By dispersion do you mean caustics? Strong caustics would really make that image.