I decided to go ahead and make @Lifeburn 's Cavern Tiles compatible for openforge 2.0 tiles by @devonjones. I basically cut the bottoms of the models to make it thinner. You should now be able to combine them with any openforge 2.0 bases (2x2). Let me know how this works out for you guys!
EDIT: I added a reworked Cavern Wall and Corner Tile with a thinner outside, because in some Cases the thick backsides of the originals, can prevent you from building particular layouts.
PS: For some reason the files sizes are larger than expected. It will take a little longer than usal to import the stls into cura. I will reduce file size in the future.
I also remixed Lifeburn's Cavern River Tiles https://www.thingiverse.com/thing:3517355 and Graveyard Tiles https://www.thingiverse.com/thing:3518744 to make them Openforge 2.0 compatible, so check that out too!
All the credits go directly to Lifeburn for designing those awesome tiles! I just edited them a littlebit, because I liked them very much and wanted to use them on my game table alongside my other openforge 2.0 tiles.