User Guide > Rendering and Render Setup > Shading > mental ray for Maya Shading > Basics of mental ray for
Maya shading >
Troubleshoot mental ray
for Maya transparency mapping is broken
When rendering scenes using transparency mapping, you may find that the render does not match that of earlier releases. The behavior has been changed to be more consistent with that of the mental ray. To revert to the old behavior, enable the Rendering preferences attribute in the Rendering preferences.