So I've a big building I have to move from one sever to another. Doing that without crashing it is nearly impossible ( 1 mil+ blocks). Although much of the selection is actually terrain (the buildding incluedes a mineshaft system). So if I could copy and paste just the air blocks, and the other blocks, excluidng dirt and stone... it probably would work and wouldnt crash the server. But as far as I know, //gmask doesnt affect what you have in your clipboard, but just the blocks you are changing, so thre's no mask I can use to make it work.. or am I wrong?