[lisyarus]

> It's a mega-kernel, so you'll get poor occupancy past the first bounce

Sure! If you look into the to-do list, there's a "wavefront path tracer" entry :)

> new origin should be along the reflected ray

I've found that doing it the way I'm doing it works better for preventing self-intersections. Might be worth investigating, though.

[omolobo]

It probably works better when the reflected ray is almost tangent to the surface. But that should be an epsilon case.