Mask Modifier > Model: Material ID

It would be cool to have more modes on the mask modifier.

I would like to hide by material ID.

Example: I could do this by hand, selecting the material IDs and creating a vertex group, but when the IDs are generated dinamicaly, this cant be done. For example: before the "Mask" modifier I'm using a "Solidify" modifier with material index offset, and I want to mask one of the new ids.

How would it work: On the "Mask" modifier Mode option you could choose material ID and choose the ID number to mask.