Corona has this map that its very useful for Vegetation, right now is compatible with Vray, but not with Vantage, the procedure is to create a Vray2Sided with 2 materials as usual
Submitted on AHA Ideas (VRAYMAX-I-58).
This is released in V-Ray 7.2 for 3ds Max. It will be available soon for the other integrations.
Submitted on AHA Ideas.
AHA Ideas status: Released.
Set during AHA Ideas to Discourse migration.