AK Interactive Gouaches Nature Weathering Effects Set (AKG26)6 tubes (20ml.) This set contains the colors selected by Adam Wilder for creating mud, sand, soil, or moss effects on our models and dioramas. Gouache is a paint that can be mixed with various fillers to achieve greater thickness and consistency when needed. Contains: AKG03 SAND AKG04 EARTH (DRY)K AKG05 DARK EARTH AKG06 DRY MUD AKG07 DUST AKG08 MOSS GREEN AK gouache paints are a combination of opaque pigments mixed with a water based binder. They