What is Normal Map for Game Textures?
Game textures live at power-of-two resolutions and usually tile across large surfaces. This page focuses on producing tileable normal maps for environment kits and props, with settings tuned so detail survives mipmapping down the render distance.
Common Uses for Normal Map for Game Textures
- Build a tiling normal map for a modular wall or floor kit
- Create prop detail maps for weapons, crates and machinery
- Prepare texture sets for a Godot, Unity or Unreal environment
Tileable normal maps for modular kits
A modular kit looks wrong the moment a tiling seam appears. Start with a height map built to tile (mirror or offset the edges), generate the normal map here, then test by placing four copies in a 2x2 grid and checking the seam under a moving light. The border sampling in this tool reads the opposite edge, so a tileable height map yields a tileable normal map.
Mipmaps and texture memory
Normal maps are vector data, so aggressive compression causes visible lighting artefacts. Use BC5 / high-quality normal compression rather than BC1, and enable mipmaps. For mobile, consider a half-resolution normal map with a stronger base colour to hide the reduced detail.