Hi.. This is my first post. :)
I recently started mapping for HL1, and i read almost every useful tutorial here on the site.. But i have a problem.. I want to build a room like shown on this picture.. http://frip.dk/helious/Room1.JPG

Every wall tutches eachother, and there is both a floor and a cieling.. But in the log it says that i havevery many leaks.. I checked every wall and they all tutch eachother.. I really cant see the problem..

Im trying to make some custom "Rock" like walls to make it look like you are in a cave...