NoteWhen baking light maps using mental ray
some of the built-in texture filtering features in Maya can be of
great help. For example, when a texture bake operation has been
performed, go to the File Texture node in the shader
network (by default connected to the outColor channel of the assigned
SurfaceShader) and under the Effects tab
in the Attribute Editor adjust interactively using
the Filter and Filter
Offset controls (the Filter Offset control
is very sensitive and is effective with values in the 0.05 range)
to get the required smoothness. This may then be converted to an
unfiltered texture by using the ConvertToFileTexture procedure.