As far as I am aware, the smallest texture size you can have is 4x4. All textures must be divisible by four or they will cause crashes.
The one exception I am aware of (for Skyrim/SE) is LOD billboard textures which have variable height (or maybe its the width that's not divisible by 4). These textures are in Textures/Terrain/LODGen/(plugin name)/ and won't actually be used in game, they are simply for xLODGen or DynDOLOD to use when creating an atlas.
As far as I am aware, the smallest texture size you can have is 4x4. All textures must be divisible by four or they will cause crashes.
The one exception I am aware of (for Skyrim/SE) is LOD billboard textures which have variable height (or maybe its the width that's not divisible by 4). These textures are in Textures/Terrain/LODGen/(plugin name)/ and won't actually be used in game, they are simply for xLODGen or DynDOLOD to use when creating an atlas.
Recommended tags: CTD.