Texture files - naming conventions
Surfaces contain references to texture files in the library. These texture files are differentiated by name only, disregarding their file extension.
The file names of many textures in the Surface Catalog contain postfixes which help to distinguish their usage:
•c for images in the Color channel
•d for Diffusion
•l for Luminance
•t for Transparency
•r for Reflection
•ro for Roughness
•e for Environment
•f for Fog
•b for Bump
•n for Normal
•a for Alpha
•s for Specular
•gl for Glow
•dp for Displacement
•gr for Grass
•-opt for images used by the Hardware acceleration and Basic Rendering Engine
If an image is used by multiple channels, then the postfixes are extended, e.g.: cs for color and specular channel usage.