Surfaces have variations in their properties, such as friction.
The first video game about Surface variations was released on January 5, 2010.
See also: traction
Friction is the simplest and most common variation for surfaces, especially when it's tied to surface type itself. Weather conditions can alter various surfaces to behave wildly differently.
Child groupsSlippery surfaces, Sticky surfaces, Animated Surface, Elastic surfaces, Fake surfaces
compare with these groups