I'm all for this feature, I don't know how many times I've started crafting something without knowing what is in the machine and ended up wasting materials.
Hi, ThomasMonroe
You'll be happy to hear that since this topic was opened, we made a way to know what's inside the machines.
This is the "Analyser" tool. It is very cheap and easy to build even in the early game phase. Put it in the "tools" part of the inventory. You can use the "F" key to switch between tools. This tool can also display very useful informations about molten metal.
https://www.blackvoxel.com/view.php?node=1627That said, your comment make us to think about it.
It would certainly be better to make this feature availlable from start. Not like an option.
So, it is likely we'll change this in some future version.
The Blackvoxel Team