Making a spiral staircase is easy. Making a spiral ramp, not so much. This example map gives you step by step instructions on how to make a spiral ramp utilizing vertex manipulation.
The arch this example map uses is 24 sided and 8 units apart. Manipulation is easiest in 3D mode and a 1 unit grid.
No bsp because I'm busy. Throw it in a box if you want to see it ingame.
Excellent example.
The step-by-step stages of building the staircase is also very nice. the only thing that could make this better is to make a small little demonstration map for it....
Superb stuff! = )
(standby 'till next year's annual review, lol!)
= )