Ambient Occlusion (Red Channel)
Used when no texture is loaded (PBR default: 100% = no occlusion)
Roughness (Green Channel)
Used when no texture is loaded (PBR default: 0% = perfectly smooth)
Metallic (Blue Channel)
Used when no texture is loaded (PBR default: 0% = non-metallic)
Alpha (Alpha Channel)

Generated ORMA Texture