So today let's talk about "Area Terrain"
Area terrain- I think and use it like this- a piece of green felt with a tree on it, then call it a stand of trees. Not only is it pleasing to the eye but it serves a wonderful purpose of really adding some terrain and line of sight blocking.
See an example here:

Rules:
Here's how I like to play them- I like to play them as Zero Visibility Zones unless you are on the edge of the felt. If you are then you can shoot out but also be shot at, you will receive cover bonus of -3 to be hit and +3 for armor. Also it is difficult terrain, you have to have Jungle terrain to move at regular speed through them.
Any problems with this?