ompf2.com

I'm confused. According to slide 14 of this presentation http://www.nvidia.com/docs/IO/113297/ISC-Briefing-Sumit-June11-Final.pdf , Kepler is supposed to have almost 3X the DP FLOPS/W of Fermi. Yes, it burns fewer Watts, but I was expecting at least 2X the performance. Is it just the OpenCL compiler...

Optix now has a GPU based HLBVH builder, as of version 2.5. Has anyone tried to benchmark it yet?

Does anyone know if it is work queue based or original?

Both consistency and bias are important concepts for a physically based ray tracer. Just for review: a consistent ray tracer will converge to the correct solution if enough rays are traced. Fewer rays will only result in noise. An unbiased ray tracer will give a result that is statistically accurate...

@outofspace Thanks for the pointer to Garanzha's HLBVH paper. http://garanzha.com/default.aspx The BVH build times are remarkable.

You can also add me to the list of supporters for "physically based".

My son's Latin teacher (that would be me ) prefers rtfora to rtforums, but both have the problem of having 4 syllables. Raytalk rolls off the tongue more easily. Raydev is almost as good.

First, I assume that you know how to convert between lumens/m^2/sr and cd/m^2 and cm^2 to m^2. ;) The challenge is to convert from Watts to lumens. This conversion factor depends on the wavelength, because lumens take the response of the human eye into account. Thus, to convert from W/um (I use 'u' ...