Embree v2.5.0

• Improved hierarchy build performance on both Intel® Xeon® and Intel® Xeon Phi™
• Vastly improved tessellation cache for ray tracing subdivision surfaces
• Added rtcGetUserData API call to query per geometry user pointer set through rtcSetUserData
• Added support for memory monitor callback functions to track and limit memory consumption
• Added support for progress monitor callback functions to track build progress and cancel long build operations
• BVH builders can be used to build user defined hierarchies inside the application (see tutorial BVH Builder)
• Switched to TBB as default tasking system on Xeon to get even faster hierarchy build times and better integration for applications that also use TBB
• rtcCommit can get called from multiple TBB threads to join the hierarchy build operations