SP - Blending mask channel?

GhosTDoG

Hi,

I can't find the "Usage" and "Identifier" Name for "Blending mask" channel in the documentation.

I used "blendingMask" for usage/identifier in substance designer and the channel automatically gets linked in the "channel mapping",
but when I paint in that channel nothing happens in the shader/ material.

What's the purpose of "Blending mask" and the difference f.e to "User1", how does "Blending mask" affect the shader/ material?

Thx

Froyok

User channels are designed to be used without a specific purpose by Allegorithmic. Like the name intend, they can be used for anything in custom shaders.

The "blendingmask" channel has been introduced to replace the "opacity" channel used in the material layering shaders that we provide by default. The most important difference is that the opacity has a default white color, while the blending mask has a default black color. Because of the change of behavior we wanted for the masks in the material layering workflow, we created a new channel with this specific purpose. Using a user channel wouldn't have been clear enough.