errrrrrm, im still a n00b to patches, i searched the forums on creating an arch, like an arch over a bridge, i looked at Drakirs prefab bridge and im just completely miffed as to how i make it.
Please don’t tell me to go off and search the forums, i have already tried it and found one link which was useless.
in the editor make a square brush of any size. with the brush selected press the ‘curves’ menu on the top row of buttons. this will produce a dropdown menu. select the option called ‘end cap’ for a full arch or ‘bevel’ for a half arch. now press the change view button (second row of buttons has xyz on it) until you can see the arch properly in the editor.
now assuming all that worked for you you should be able to see an outline of an arch. now while you still have it selected you can pull it, push it ect to change its size just like a normal brush. once you have it at the correct size go to the ‘curves’ dropdown menu again and select the option called ‘cap selection’. this will make a small window appear with four options to choose from. press ‘inverted endcap’ to make the sides of the arch. now thats the basics of making arches.
when you come to texturing them apply a texture to the desired arch surface and press ‘shift+s’ to bring up the pacth surface inspector. For the middle bit of the arch simply select this face and press the natural button then close the pacth surface inspector (sometimes pressing apply or ok messes things up ir at leats it does for me). now to get the textures on the front and back surfaces looking right apply the desired texture to the desired surface and press 'shift+s again. again press natural and close the patch surface inspector. Now look at the textured face and hold down shift+control then press n to cycle through fitting the texture properly until you get to the one that looks right.
opps thats a bit long winded. basically everything you want for making arches can be found in the curves drop down and everything you might want to do textureing your arches can be found in the patch surface inspector by pressing shift+s and playing around with it. if you need any more info then this clearly explain what you want to do and if i can help i’ll try to explain.
Look at these tutorials:
http://planetquake.com/bubba/bc1.html
http://planetquake.com/bubba/arch1.html
They cover several ways of dealing with curves and patches!
Thanks blushing, very helpfull indeed, as for the tuts Drakir, they are now in my favorites thankyou so much 
i can continue with my map now.
Hmmmm, the inverted endcap didn’t quite work blushing…If you look at drakirs bridge prefab, he has made a rectangular arch, but using a patch. I mean the type of arch that goes over a bridge, not an arch as in an arch for a corridor etc. :S
Any idea’s on that one ? or do i have to use vertex editing for it ?
try the “thicken patch” option on an end cap, that might give you the result you’re looking for, though I prefer vertex editing all the stuff. Once you get the hang of it it ain’t that complicated. Don’t know if there are any good tutorials on this out there though.
do you mean the iron girders from drakirs rhine bridge. The ones that go over the bridge? If so then you can make rough ones using the thicken command like Mindlink says. Simply make the first part of the arch and while its selected use the thicken command. You’ll need to play around with it a bit to get sizes right. If you want to change what side gets the thickened bit then select your endcap scroll down to matrix and select invert. this will change what side will have the texture on and also what side will thicken. i believe there is a simple tuturail on this at
http://www.wolfensteinx.com/surface/tutorials.html
If you want to make more precise arches and stuff then you’ll need to use long thin patches and vertex edit them. this is a bit more complicated, there is a tutorial on the site above about making vaults. the first part of this tutorial tells you how to make half arches using patches. you could probably apply this to making full arches as well.
if none of this helps then let me know and i’ll try and whip up a brief tutorial but it might take me while as im very busy at the moment
WoW, that link is awsome man, i see how you made ur vaults now. I have almost got the vertex editing, i’m just playing about with it till i understand it properly … shouln’t be too long. 