Well, I think I've seen enough. A 24 player map? Maybe, if you had a really strong machine. The bases are two castles, protected by a wall and a gate. However, you can breach the other teams territory by taking the never-ending journey through the mountain tunnel. You also have the option for a long swim, or to translocate. If you play with a bunch of people, you have a chance to get the flag back home. If you drop it, somebody behind you can keep going. But since occlusion problems (big, open spaces) and high polys (over 400 in some views) can cause slowdowns, adding more and more players just makes things worse. If you play with fewer players, there is less lag if you have a slower machine, but you might not have enough backup. Then you have to take the 3-hour tour all over again. It's a catch22.

Textures were overused, but then again, more textures would have added more lag, or at least until the engine computed them all. Same texture for the floors, walls, ceiling, over and over again. Still, the map has some appeal to it, so I don't want to paint the wrong picture. The bots, well, they need some work. They would either drown underwater, cycle back and forth here, or over there. A bot had the flag in his greedy, little hands, was at the stairs at his base, and instead of just running up for a point, he just kept running back and forth next to the stairs. An enemy bot shot at him, and he went on up for the score, but you see how this can be a bad thing. If you play online with 24, good luck. If you play against the bots, good luck. It just doesn't have the feel of a good CTF map. The author is a newbie, so all is forgiven.

~End of review~

For the author: Not too many people could comfortably play your map with the lag it has. It's not laggy everywhere, but it's enough to be a problem. Occlusion and polys are what is doing it. You know that big zone sheet you tried to use? It does almost nothing. If a player looks in the direction of that sheet, the zone is breached. In other words, the sheet might as well not even be there, unless you're turning away from it. And when you are looking away from it, you aren't looking in a direction of high polys anyway. It might help with the occlusion issue a little if you're not looking at it, but that's a maybe. Occlusion is big, open spaces. The UT engine has to calculate what may be in view, and it will stop calculating at a zone sheet and not bother calculating what is behind it, as long as you don't breach the zone by looking at it. So the engine is trying to compute all the stuff you made on the map, most of the time. There is also a thing where a sheet becomes so big that it can cause a slowdown, if it's a zone portal sheet. Those long stairs sort of defy gravity. Just something I noticed. Oh, and add some light fixtures wherever you have light, likes in those water tunnels, and an outdoor map could have used some outdoor ambient sounds.