There are two versions of Graal3D, the one in the OP and the one Callimuc posted. The one Callimuc posted is the very original Graal3D coded by Stefan from the ground up, and was made not too long after Graal itself was made(I think it's from 1999 or so?). The second one was made using an engine, though I forget what engine they used; may have been Torque. It was much more modernized and "properly" developed than the original, since it was using an actual engine rather than doing it from scratch. You can find quite a few screenshots of that floating around(even on the main page if you can navigate your way through the maze that is the GraalOnline site) since Graal3D was made open beta to people who bought VIP or something like that.