Well I finally figured out how to get the terrain mesh into radiant 1.5, but my problem is compiling, it will go through all the steps during the building time, but it does not compile into the bsp file. So does anybody know what the problem is? The number of brushes I have is around 5000 so that shouldn't be to big of a problem right?
Make sure you select a compile option with -BSP in it. Also make sure your looking in the correct folder.
Post the compile log... So we know when it bugged..
I didn't make it!
Make sure your map isn't too big. I did some experimenting, and found that a map will have some major problems if it gets bigger than about 1/4 of the total world size(the entire grid from edge to edge) Also, make sure you follow the instructions and select all brushes and copy them into a new map file before compiling.