Texture/Map Input for Specular Layer Anisotropy Amount

[Ement]

Working in C4D Octane 2026.3 Build 1.9.3.

My material stack uses a Layered Material with a basecoat, metallic flakes, a tinted binder layer, and then a Specular Material Layer as the main clearcoat. For realistic clearcoat microscratches, I need to control these three properties BY TEXTURE MAP on the clearcoat layer:

Roughness
Anisotropy amount
Anisotropy Rotation

The issue is that the Anisotropy Rotation channel allows texture/map input, but the Anisotropy amount itself appears to only accept a constant value. This makes it difficult to create realistic localized microscratches, because the scratch mask should increase anisotropy only where scratches exist, instead of applying anisotropy uniformly across the entire clearcoat layer.

Is there a reason the Specular Layer’s anisotropy amount does not accept a texture input? Is this an intentional limitation of material layers, or is there a recommended workaround?

Thanks!

[ChrisHekman]

Working in C4D Octane 2026.3 Build 1.9.3.

My material stack uses a Layered Material with a basecoat, metallic flakes, a tinted binder layer, and then a Specular Material Layer as the main clearcoat. For realistic clearcoat microscratches, I need to control these three properties BY TEXTURE MAP on the clearcoat layer:

Roughness
Anisotropy amount
Anisotropy Rotation

The issue is that the Anisotropy Rotation channel allows texture/map input, but the Anisotropy amount itself appears to only accept a constant value. This makes it difficult to create realistic localized microscratches, because the scratch mask should increase anisotropy only where scratches exist, instead of applying anisotropy uniformly across the entire clearcoat layer.

Is there a reason the Specular Layer’s anisotropy amount does not accept a texture input? Is this an intentional limitation of material layers, or is there a recommended workaround?

Thanks!

SS1.png

Octane does support this, however the pin hasnt been added to the specular layer it seems. Ill make a ticket to add this

[Ement]

Thanks! Would love to see this in the specular layers.