This is so beautiful !How one achieves such an effect ?
Nice. I never knew how it's done!
Is it long to render ?Because a rotation of the central prism would give a quite mesmerizing animation !! :)
light tracing should work better for this kind of scene
It does not work for glossy objects
yep, it also works pretty bad. It can be improved to work reasonably well, but there is no point, since BDPT/VCM is so much better anyway.