2008

TIP For large scenes, increasing the Depth value to 50 or more can greatly improve
rendering time.
Ray-Trace Acceleration: Parameters for the Grid
Method
Rendering menu > Render > Render Scene dialog > Renderer panel > Rendering
Algorithms rollout > Raytrace Acceleration group > Choose Grid as the Raytrace
Acceleration method.
Main toolbar > Render Scene > Render Scene dialog > Renderer panel >
Rendering Algorithms rollout > Raytrace Acceleration group > Choose Grid
as the Raytrace Acceleration method.
Note: The Processing panel appears only when the mental ray renderer is the
currently active renderer.
When you choose Grid as the Raytrace Acceleration method on the
Rendering
Algorithms rollout
on page 6118 , the Size, Depth, and Resolution parameters
are displayed. The grid method subdivides the scene into a grid of "voxels." A
voxel is a node in the subdivided scene.
Interface
Size Sets the maximum number of triangles in a voxel. If a voxel would
contain more triangles, and the Depth setting permits it, then the voxel is
subdivided into a subgrid. Default=128.
Depth Sets the number of recursion levels. If a voxel grid contains too much
detail, it is subdivided into a subgrid, which adds one level of recursion.
Default=2.
Resolution Sets the number of grid voxels in the X, Y, and Z dimensions. If
the value is zero (the default), the mental ray renderer automatically sets a
value. Default=0 (automatic).
6142 | Chapter 18 Rendering