Author of the LT-DoorMat Mod: Dracoix
The LT-DoorMat adds a doormat object that keeps filth in place and makes cleaning easier. The doormat is buildable after researching Carpet Making.
The doormat added by the LT-DoorMat Mod comes in two sizes and three colors.
Compatibility notes
The LT-DoorMat Mod supports the following languages: Chinese (Simplified and Traditional), English, French, German, Korean, Polish, Portuguese, Russian and Spanish.
More information on the LT-DoorMat Mod on Ludeon Forums.
Summary
The LT-DoorMat Mod is perfect to stop the filth from spreading on your interiors. Specially if you have animals going in and out. Just place doormats on your front doors like civilized people.