I've uploaded beta2 to the beta server.
A couple little things that bug me. You've put a lot of attention into the texturing and alignment, but there are a few areas that don't look right.
First shot: I'd suggest moving the block brushes slightly so the texture aligns cleanly with the edge of the brush and you don't have a bunch of "half-blocks". It looks particularly bad on the corner of the tan blocks jutting out. You end up with some impossible blocks. Also, to the right, you have blocks that are half tan and half grey. With the low res textures it's not really noticeable, but with the high res textures (don't have them handy on this machine), the grey and tan blocks look quite a bit different. When you line the brushes up with the textures, you might also want to rotate some of the block textures 90 degrees so that the block structure makes more sense.
Second shot: It would be nice if the stairs lined up better with the block textures on the side. I'm not sure how easy that would be to fix, but right now it looks like somebody just took a chainsaw and randomly sliced stairs out of a block wall, when in reality, the blocks would be placed as stairs. Also, the metal texture has varying scales. You probably want to stick with a 1.0 scale or higher everywhere possible as scaling the texture down can increase r_speeds and lightmap area.
As for the rocks, 3D clipping planes are your friend. Oh, and I think you need to increase the ambient sun light a bit. Some of the areas are really dark, even though they are outside. Also, the sun angle needs to be lower to line up with the sky better (plus it would be cool to see those pillars casting longer shadows).
