Bad texture here
(http://img81.imageshack.us/img81/5743/loltexture.png)
Hom here
(http://img134.imageshack.us/img134/4189/hom.png)
Why can't I fall into the water?
(http://img81.imageshack.us/img81/6555/cantfalltowater.png)
The barrier is just a texture, I can't walk on it. That's dumb. Either remove the texture or make it possible to walk on it.
(http://img263.imageshack.us/img263/5268/ifallthoughbarrior.png)
FreeDooM for the lulz :P
Anyway, make your map, test it in Software only. Then add the OGL shit.