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#raytracing

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#raytracing folks, what do you think of next event estimation vs simple MIS (generate either brdf sample or light sample, use total probability in MC estimator)?

My former student insists on NEE, but it has so many special cases that I doubt it's a good idea pedagogically.

#FluidX3D #CFD v3.2 is out! I've implemented the much requested #GPU summation for object force/torque; it's ~20x faster than #CPU #multithreading. 🖖😋
Horizontal sum in #OpenCL was a nice exercise - first local memory reduction and then hardware-supported atomic floating-point add in VRAM, in a single-stage kernel. Hammering atomics isn't too bad as each of the ~10-340 workgroups dispatched at a time does only a single atomic add.
Also improved volumetric #raytracing!
github.com/ProjectPhysX/FluidX