Max Resolution for MOTION. Limit by Display Card or Software ? or Both ?

Greeting to all fellow Motion gurus,

I am currently testing motion for an up coming project that I need to set the size of the project resolution beyond 2048 X 2048.

The project has to do with Video Wall and I really want to use MOTION for it.
I am unable to set the resolution to beyond 2048 by 2048. Is there a way to go beyond current limit ?

Best Regards,

Zippy