Automat Image Tools
Automat Image Check is a handy tool for evaluating renders and/or saved images.
It creates customizable image thumbnails with user-defined grid, posterization, and mirror settings. Helps with composition and lighting using old-school techniques.
If you are using the standard Rendered Frame Window built into max then you can set the tool to automatically update the thumbnail every time an image is rendered. You can also check an image from an Open VRay Real-time window or check a saved image. There are a couple of smaller tools included that are helpful with quick gamma adjustments and ambient lighting.
Please let me know if you find it useful or run into issues.