This hak contains the another variations for each default tile in all tilesets without roof. This allows making rooms for bigger creatures than what fits in to the room normally. All of these tiles are automatically generated using my remove-roof.pl perl program, and the tiles.2da file is also automatically updated using update-variations.pl program (my perl tools are available at Link
So this is not really original work, as all I did was take tiles already in the nwn2 and modified them to not have roof.
10 - A Masterpiece, Genuinely Groundbreaking 9 - Outstanding, a Must Have 8 - Excellent, Recommended to Anyone 7 - Very Good, Deserves a Look 6 - Good, Qualified Recommendation 5 - Fair, Solid yet Unremarkable 4 - Some Merit, Requires Improvements 3 - Poor Execution, Potential Unrealized 2 - Very Little Appeal 1 - Not Recommended to Anyone