It sure does change skyrim, i love the looks of it when i had it but after awhile of all the incompatibility of the mods i had with tropical skyrim, i removed it. been a serveral months now since i last had it but some of the tree's and objects had no collision with anything so you can walk through or even kill npcs through them. A soon to be great mod a WIP i would call it. if you dont mind some bugs and mod incompatibility then it would be a great mod to get. With skybirds for tropical skyrim they do fly through the water, rocks, underground and so on. lol :)