You must enable enhanced layer blending to use this feature.
To enable enhanced layer blending:
On the Main menu, click Garment.
Click Enhanced Layer Blending.
Material blending modes determine how two layers of material are blended into one another.
The available modes are:
No effect, unless a transparency of greater than zero is set, in which case the transparency is applied.
Replaces the medium gray (128 level) parts of the lower material texture with the higher material texture. Therefore, unless the lower material texture is predominately medium gray, the resulting material texture is different - typically a lighter shade.
Blends the materials together, resulting in a darker colored texture.
For example, refer to Editing Fabric Properties.