I've come across the dreaded 'too many t-junctions to fix up' problem and I died a little inside. Of course, I then remembered that I could use func_brush and so I did and thankfully I've managed to cut my waterindices in half. But this sort of raises a question. What disadvantages are there to func_brush? I've only been able to find out that it doesn't cast shadow on top of models. Like in this example; I'd like some light shed on the issue before I got to func_brush a lot of my detail geometry to cut down on waterindices.