Since the last release, material modifications involves the new toolbox abilities players can activate via the Forgesmith's tools quickitem.
Here are the abilities used in material modifications :
As you can the, those are modal abilities, meaning the tools require a main ability to be enabled first. Modifications are only temporary using this tool, at least until the "Apply" ability (the 8th here) is used. Depending on the current configuration, those modifications may or may not require material supplies.

Until a proper guide is written, please watch the example video available above.

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