To blur the environment or your mental ray material, you can add the  to your shading network as follows:
         
         
            - Apply the mia_material or any other reflective mental ray shader to the object that you wish to blur. The mia_envblur shader should be used in conjunction with the reflective mental ray shaders.
            
- Add an HDR image or the mia_physicalsun/mia_physicalsky shader to your environment.
            
- To add the mia_envblur to your scene, in the  node, map the mia_envblur shader to the  attribute under the  section under .
            
- Tweak the settings in the mia_envblur to obtain the desired look.
            
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License