Mental ray also provides diagnostic and processing options that can be used for performance monitoring and debugging purposes.
The visual diagnostic options available are:
When rendering large drawings, the diagnostics help detect areas with performance gain and loss, as well as helping to determine the optimum render settings for faster or higher quality renders.
To obtain additional information from the renderer use setExportMIEnabled() and setExportMIFilaname() to save an MI file. This file is generated by the renderer, not by AutoCAD, and contains the full scene description. See the “Programming Mental ray” in the mental ray manual for a complete description of the mental ray scene description language.