Blast Furnace Expanded

This datapack lets you smelt more blocks in the blast furnace, like sand and cobblestone, which makes way more sense than the default behavior. Sand and red sand will smelt into glass, cobblestone smelts into stone, stone smelts into smooth stone, and deepslate turns into cobbled deepslate.

No mods needed — just drop it into your world's datapacks folder and reload.

Let me know if you think more blocks should be added. It's a small tweak, but it really improves the blast furnace use.