I think the cost is fine for making single blocks of glass, but if you’re making a bulk batch it should be 5-10x more efficient. Possibly make one of the advanced machines required for efficient glass crafting? As it is right now it took me and a friend several days of digging to make a large window for one house. I would also love to see glass slabs and chiseled glass, along with a texture that is borderless, or at least has the border only around the edges and not the middle.