I might have a couple of older PC's at my disposal in the next few weeks, hopefully I'll be able to replicate some of the OpenGL 1 problems once they arrive
@ciba43: Make sure you're using the "OpenGL 1 Display Lists" renderer, because the "Immediate" one is SUPER SLOW. I'll probably remove that one because the Display Lists should work fine for all GPUs. I don't think OpenGL 2 adds much in terms of improving performance (I'm not a graphics expert so I don't know how to do all the optimisation tricks...)
@rufee: Most of those are planned, and the real-time WAD updating is pretty cool but would require a bunch of trickery to get working properly. It's definitely something that I would like to do in the future, though! Drawing text on the screen is much harder than you would think, but I will add it at some point
@ninja: Yes, displacements will be added with the other Source features, but they will be supported in Goldsource by creating tetrahedrons when it converts to MAP format for compile.
@Stu: I plan to make the side bar more customisable - but for now, just collapse a few of the higher panels so you can see all the brush details
@All: Thanks for the feedback, everyone! I'm having trouble with model loading at the moment so progress is very slow. Patience is a virtue!