Parallel to the release of Spotmask for mentalray, 3d-io has provided a collection of comprehensive video tutorials which may help you to optimize your workflow and understand correctly how 3ds max and video post-processing software interchange the data.

We have published the whole collection of tutorials for free on youtube, so everyone can profit from the know-how.
Please follow the link to 3d-plugin Youtube channel and check the tutorial collections.

3d-plugin Youtube channel