Reservoir wall

Little modelling update. more to come, but I was quite pleased with this. i intend to have the tower on the left fallen into the first two segments of wall to create on entrance into the reservoir behind it, making a nice opening to the top right spawn area.

There is however an exporting error with the tower... something along the lines of degenerate faces... faces with 3 same coordinates so perhaps that's a question for Ewan. I've tried the clean-up and merge verts/edges functions so it is an odd one. although I've noticed that extruding in two directions (once inwards once outwards) on the same side of an object (but a different face) seems to have some odd effects with the faces I've divided with the interactive split tool.