[2021] forging

Originally posted by seven:

Originally posted by crmarlow2874: Once clay soil is smelted it can't be extracted

Actually, you can "craft" all the smelted materials out of the forge. That is how you can unload a forge before moving it. For clay, just look for Clay Soil in Resources tab of the forge.

This.

To the OP, Anything asking for 'Clay' and not 'Clay Soil' is something that must be crafted in the forge UI, rather than by hand or anywhere else, as it uses the molten Clay resource which cannot be handled directly.