Rendering menu > Render > Render Scene dialog > Renderer panel > Rendering Algorithms rollout > Raytrace Acceleration group
> Choose BSP or Large BSP as the Raytrace Acceleration method.
Main toolbar > Render Scene > Render Scene dialog > Renderer panel > Rendering Algorithms rollout > Raytrace Acceleration
group > Choose BSP or Large BSP as the Raytrace Acceleration method.
Note: The Processing panel appears only when the mental ray renderer is the currently active renderer.
When you choose BSP or Large BSP as the Raytrace Acceleration method on the Rendering Algorithms rollout, the parameters described here are displayed. BSP stands for Binary Space Partitioning. BSP is the default method. Large BSP is a variant whose partitioning tree can be swapped in and out of memory, making it suitable for rendering very large scenes.
Note: If the scene contains too many faces (triangles) to fit in a tree of the size specified by the Size and Depth parameters, mental ray disregards the Size value and creates larger leaf nodes. This can significantly slow down rendering. To avoid this problem, increase the value of Depth.
Size—Sets the maximum number of faces (triangles) in the leaf of a BSP tree. Increasing the Size value reduces memory consumption but increases rendering time. Default=10.
Depth—Sets the maximum number of levels in the BSP tree. Increasing the Depth value reduces rendering time, but increases memory consumption and preprocessing time. Default=40.
Tip: For large scenes, increasing the Depth value to 50 or more can greatly improve rendering time.