MR Native Ink 'n Paint Material
The current Ink 'n Paint Material in 3ds Max does not natively support the Mental ray renderer in many circumstances. Daylight systems are an example. An Ink 'n Paint material will render black when a daylight system is used. There are workarounds that are rather tedious, but native MR support for this material would be ideal. Perhaps, a MR specific version could be created or even an Autodesk Material.