<textureName>.mat or <modelFileName>-<materialName>.mat material name.
Name materials <textureName>.mat (i.e. diffuse texture name of imported material) when searching for existing or creating new materials. If material doesn't have a texture or texture doesn't exist in Unity project folder in one of Textures folders, then material will be named <modelFileName>-<materialName>.mat instead. This option has behaviour compatible with Unity 3.4 and earlier versions (i.e. same behaviour as ModelImporterGenerateMaterials.PerTexture). See Also: ModelImporter.materialName.