The Vallejo Weathering Effects range, have been formulated with permanent pigments and water-based acrylic resins, have been developed to represent the effects of time and weather on models and dioramas.

Brown Splash Mud is a dark coloured mud, typical of fertile clay terrain where humidity is retained during long seasonal periods, found mostly in Mediterranean lands and the west of Europe. Different from Vallejo Brown Thick Mud (73811) this Weathering Effect gives the apperance of watery mud splashes.