Overwrite only specific channels with V-RayDecal

Add a switch in V-RayDecal to override only specific channels (Diffuse, Reflection, Refraction, Coating).

For example, you can create a wet effect by overriding only the coating channel. (This will not affect the original Diffuse channel.)


Submitted on AHA Ideas (VRAYMAX-I-199).

AHA Ideas status: Pending.
Set during AHA Ideas to Discourse migration.