Location:
• The Render Manager > mental ray (Global Renderer)
• The Render Manager > (expand a pass) > mental ray
• Set a current pass and choose Render > Render > Renderer Options from the Render toolbar.
• Tab: Diagnostics [Properties Reference]
• Options: Logged Messages
The mental ray rendering software can provide detailed messages as it reads and renders a scene. You can use these messages to help you fine–tune for quality and performance. For example, keeping track of triangle count, etc.
You can choose to output any combination of the following message types by checking the corresponding checkbox:
• Errors — outputs messages about missing .dll files, missing shaders, and other errors that may cause the render to abort.
• Warnings — outputs messages relating to problems that may cause the scene to render incorrectly.
• Information — outputs information computed for the scene, such as BSP tree statistics, tesselated triangle counts, number of rays fired, and so on.
• Progress — outputs the percentage of the scene that has been rendered, and other information about rendering progress, such as when the render begins and ends.
• Basic Debug — outputs information about what information is computed and sent as each tile is rendered.
• Detailed Debug — outputs detailed information about what information is computed and sent as each tile is rendered.
When rendering from the command line, use the -verbose argument.
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To write the verbose messages to a file, you must set command–logging to file in the Preferences window. For more information on setting a log file, see The Command Log [Customization]. |
Verbose messages are logged to the script editor, and/or the log file. To see the verbose output, simply open the script editor by choosing View > Scripting > Script Editor from the main menu.

The following table will help you understand logged messages:
|
Message Code |
Meaning |
|
API |
Construction elements in the scene database |
|
DB |
Storage management of elements in the scene database |
|
DISP |
Communication with real-time image views |
|
ECHO |
Print the scene database in .mi2 format to stdout |
|
GAP |
Geometry Approximation (tessellation into triangles) |
|
GAPS |
GAP scheduler that routes approximation requests |
|
GEOM |
Geometry modeling operations |
|
GEOT |
Geometry conversion for tessalation, a submodule of GAP |
|
IMG |
Image file access, disk read/write/map, and conversion |
|
JOB |
Job control |
|
LIB |
Library of mathematical (and other) functions |
|
LINK |
Dynamic linking of shaders and shader libraries |
|
MAIN |
Start-up and interpretation of the command line |
|
MEM |
Unstructured memory management |
|
MI |
MI scene file parser, converts text file into API calls |
|
MSG |
Low-level message passing and thread management |
|
PAR |
High-level parallel message routing |
|
PHEN |
Phenomenon (shader) management and evaluation |
|
RC |
Rendering component, front-end management module |
|
RCB |
RC submodule handling triangle boxes |
|
RCC |
RC submodule handling contours |
|
RCGI |
RC submodule handling caustics and global illumination |
|
RCI |
RC submodule handling scanline rendering and raytracing |
|
RCS |
RC scheduler that routes rendering requests |
|
SCENE |
Structured memory management |
|
TASK |
Parallel task management and loading |
|
INVENTOR |
Silicon Graphics Inventor real-time scene previewer (optional) |

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