Adjust anti-aliasing in mental ray for Maya

 
 
 
Note

You may not need to adjust quality settings for an entire scene. Adjusting settings on a per-object basis is often more efficient and has less of an impact on rendering speed.

For more information on aliasing artifacts and strategies on how to fix them, see Adjust scene anti-aliasing parameters (Maya software).

mental ray anti-aliasing specifics

Manually adjust the following: