Hmmmm
This one has died out a bit. It could have been very cool, but I never quite got it to work.
CTF-Sfear][ had nice angles for the warpzone portals, which could be expressed in whole units/angles. However if I had used 6 segments, like in CTF-Sfear][, for the outside of the sphere, then it would've be possible to get seriously stuck between 2 warpzones. Near the portals the surface is so steep that you slide back if you don't have enough speed. I lowered the gravity in CTF-Sfear][ so that you need very little speed to slide to the warpzone. However in CTF-Sfear]|[ you would slide
down to a warpzone, go through it, slide back, re-enter it, and so on...
So I figured I had to use 8 segments for CTF-Sfear]|[ (cutting the sphere like an octahedron). I've spent a great deal of time calculating angles and relations between width/breadth and height of the segments. With the Ued tools it would have been possible to create a perfectly working sphere. Unfortunately the way UT handles warpzones and it's portals is very buggy. When testing, some portals worked fine, but some only produced HOM, while they were all
exact duplicates! The portals were perfect in Ued, but some just refused to work properly. Also at some warpzones you could walk
over the portals (??). I never understood what I was standing on, there was nothing there?!
Another big problem was the sphere itself, the surface. The only way to make a convincingly looking round surface, is by using the sphere builder and clipping off the part you don't need. However no matter what I tried, the sphere turned into one big BSP hole...

It didn't want to be solid, you'd just fall through the ground and die in solid space.
It was all misery, so I abandonned the project and started working on CTF-Rollercoaster. If you insist, StoneViper, I could give it another try, or if you want I could explain to you how the make a sphere out of 8 pieces and you can try and get it to work yourself.