‘Can't calculate tangents, because mesh '<your_object_name>_BOXCOLLIDER|mesh:<your_mesh_name>|Dupli|' doesn't contain normals.’
### TexturePostProcessor
Used to perform various operations on textures on import to Unity. Configured with constants in the top of the file.
Only works on files with the extension `EXTENSION` (default ".png").
#### Specular maps
If `SPEC_ENABLE` is enabled (default true), textures with the suffix `SPEC_TAG` (default "-spec") will be copied into the alpha channel of the texture without that suffix. For example, the file `foo-spec.png` will be copied into the alpha channel of the imported texture `foo.png`.
#### Normal maps
If `NORMAL_ENABLE` is enabled (default true), textures with the suffix `NORMAL_TAG` (default "-spec") will be marked as normal maps on import and when KSP PartTools exports the texture. if `NORMAL_GENERATE` is enabled (default true), then the texture will automatically be converted from a hightmap using Unity's normal map generation tool.