looks like the border is a strip - you can see a little distortion on the curves. Perhaps it uses a mask and draws it on top of the tiling body texture. I've seen water done kind of similar - tiling water texture and the engine detects the shoreline and puts a trim strip along the border.
hi guys, I'm trying to pick apart how these levels would be created, specifically how the textures for the levels are done- they seem to have a border and an inside area texture but the transition between the two is fairly seamless: http://www.touchgen.net/wp-content/uploads/2011/08/iblast-2.jpg…