Alloy's most basic and common packed map. These files have an "AlloyPM" suffix.
- R: Metallic
- G: Occlusion
- B: Specularity
- A: Roughness (w/ optional Specular AA)
NOTE: The R, G, and B channels may contain shader-specific data depending on the shader type. For this reason, we provide a premade map for the Hair shader that is set by default.