I'm sorry if I come off as being a bit sacreligious for asking for curves in a minecraft-like game, but think of all the amazing ships that could be built if there was a tool for curving blocks I feel like it would be easy to do this by just making a "curve" or "arc" tool as part of the advanced build mode. The curve would be defined by selecting the plcks you wanted to make an arch out of, and then say clicking a button in the build menu that would consume the neccessary resouces. Comment if you have any better build mode ideas or ideas about a curve tool. I think it would be really useful.