Hello!

This Full HD video is showing how to matte by surface using TrueArt's Global Materials and TrueArt's Node Library.

https://www.youtube.com/watch?v=mGo4kzcBQFs

It's using TrueArt's Global Materials
http://globalmaterials.trueart.eu

and
TrueArt's Node Library
http://www.trueart.eu

You can easily generate whole image sequence of mattes for different surfaces, at different frames.

I showed how to drive it using current frame, but you can have different trigger.

It's alternative method to previously showed
https://www.youtube.com/watch?v=N4UuUaJbV18

Best Regards!