Yeah I thought about that for a moment but then I figured it would only ruin the look of the map. Plus, I sort of figured if you wanted to stand up against a tree to hug it you probably could. Seeing as I was trying for more realistic looking trees I figured to drop that functional aspect. Also, if you really want to have a battle among the trees it would probably be a better idea to have a forest without the canopy. That way LOS could be easily established and it would be clear where you could move to.
If it was me using this map I think I would make movement more difficult once you got into the tree areas but I'm not an expert in miniature play.
“When it’s over and you look in the mirror, did you do the best that you were capable of? If so, the score does not matter. But if you find that you did your best you were capable of, you will find it to your liking.” -John Wooden
* My Finished Maps
* My Challenge Maps
* My deviantArt
4e D&D just says double movement cost and then you get cover, so thats easy