Not sure if this helps, but...
From the docs:

"The usage for this pre-render setup is straight-forward. A new and optimized scene file is generated and is ready for the renderer. See the following maya -optimizeRender -help message:

Usage: maya -optimizeRender [options] mayaFile optimizedMayaFile

-botRes 'int'
Minimum file texture resolution that will cause BOT files to be produced. For example, specifying "-botRes 256" means that all file textures bigger than 256x256 will be converted to BOT format. The default value is 0, meaning all file textures will be converted.

-botLoca 'name'
Directory in which BOT files reside (default is in the same directory as the original file).

-help
Prints this message.

-noBOT
Avoid BOT creations.

-noCleanup
Avoid cleaning up useless data.

-tessFreeze 'start frame' 'end frame' 'by frame'
Calculate NURBS tessellation that gives the best image quality based on the camera projection."


still checking for more tips..... hold on...