The second beta version of CopperCube is now available, and I implemented a lot of the feedback I received already. The whole 3D user interface has been reworked (now irrEdit style controls), and I added 3d sounds, paths (for camera flights and moving objects), verical billboards and other interesting things, together with some bug fixes and 3d engine speed enhancements. Also, some of the examples have been updated. Here is the one with the building again:
I know, it's still ugly, and I think I'll invest some time to make most of the examples a bit better soon. :)
You can download CopperCube here.