OSPRay 3.0.0 GPU shows poor performance compared to CPU
After trying OSPRay 3.0.0 GPU in VTK on an Intel Arc 770, it seems that the performance is rather poor compared to using the CPU (i7 6700). A simple scene with a PolyData bunny and the 'pathtracer' renderer type shows no performance benefit for the GPU at 720p, performances are on par.
Further testing on the 'TestOSPRayCompositePolyDataMapper2' shows that rendering on the CPU is almost 10x faster than on the GPU.
On the other hand, the osprayExamples (built with OSPRay) that do not use VTK indeed show an appreciable speedup for the GPU.
Edited by Francois Mazen