This procedural will run an external application in order to generate geometry at render time. The name of the program to run must be specified. Alternatively, a second program string can be specified to generate motion blurred geometry.
Before the program is run, the program string is scanned for the sub-string '%LOD'. All occurrences of this sub-string are replaced with the level of detail computed by mantra (a floating point number representing the screen space.
Program - The program to run to generate geometry. For
Blur - The program to run in order to generate geometry
Shutter - Optionally, a shutter time can be specified
This procedural requires a bounding box to be specified.
When generating motion blurred geometry, the bounds must enclose the blurred geometry as well.