I am trying to create "ribbed like" walls and tunnels. (Go to "http://www.pluton.co.uk/andy/images/tunnel.jpg") to see what I am talking about.
I have tried to use cylinders and archs that I make into arches which have curved surfaces. However, this process is kinda buggy and it puts a ton of polygons on the screen, and in many cases crashes hammer.
I was wondering if there was a way I could create a custom texture with some sort of bumpmapping effect that could achieve the same effect but draw less on the system.