*_bump.dds

About

The bump map is a regular normal map in A(BGR) format (typical for DXT5_nm compression format). The developers used this order for a very simple reason - DXT compression “spoils” the texture much less, since the alpha channel is not subjected to compression and remains almost in its original form.

Technical information

Format

• R - Glossiness (Glossiness, aka inverted roughness. It works best in stalker, and allows for using better BRDF)
• G - Normal Z (Unused)
• B - Normal Y (DirectX format)
• A - Normal X

Supported texture compression formats

• DXT1
• ADXT1
• DXT5
• 4444 (RGBA4444)
• 1555 (RGBA1555)
• 565 (RGB565)
• RGB
• RGBA
• BC7 (DX11)
• A8
• L8
• A8L8

Can be generated by

• Bump Generator
• SDK

Programs editing this file

• Any program that works with *.dds files (Example: Paint.net or GIMP)