> On 29. Jan 2018, at 21:10, Sergey Sharybin <[email protected]> wrote: > >> 4. Extract BVH data from Embree and write GPU traversal code. > > To my knowledge you can provide Embree a custom node/primitive builder > functions, so not sure what exactly "extract" mean here?
You can, but not with full feature access. There’s no motion blur or OOBB (for hair) when using the separate BVH builder. To make use of those (IMHO essential) features, one needs to either use Embree’s own rtcIntersect calls for traversal or extract the raw BVH data from it like in this sample code: https://github.com/embree/embree/blob/master/tutorials/bvh_access/bvh_access.cpp My current implementation is using rtcIntersect, so it’s not using Cycles’ BVH traversal code at all. To get this to the GPU, we’ll need to port rtcIntersect to the GPU and extract the necessary data structures from the opaque RTCScene pointer in order to copy them to device memory. -Stefan _______________________________________________ Bf-committers mailing list [email protected] https://lists.blender.org/mailman/listinfo/bf-committers
