What is auxillary terrain?

[Stan Shebs]

Stanley Sutton wrote:
> 
> What is auxillary terrain, and what games use it?

Terrain that augments the basic terrain type.  There are three
types; border terrain, such as rivers, connection terrain, like
roads and rail lines, and coating terrain, like snow and mud.
Borders and connections are represented as bits, one for each
direction, and coatings have depths.

(This is all from the manual BTW.)

Many games have roads and rivers, some even with multiple types of
each, while only a couple, such as WWII strategy use coatings (can't
have an Eastern Front without seasonal snow and mud! :-) ).

Stan