It is also common for models not to depict human or humanoid characters. Many gaming systems include rules for using vehicles, such as aircraft or tanks, or mechs so there are many available gaming figures to represent these in gameplay. There are also companies that make scale kits of vehicles such as aircraft or tanks as standalone models rather than gaming pieces, such as Airfix models, however there is often a distinction made between those who paint such kits (scale modellers) and figure painters. It is also common for both gaming models and display models to depict mundane animals and fantasy creatures, either as single models or as part of a diorama set.