There’s an ongoing discussion about this at the moment on the Allegorithmic forums. It looks like you will just need to credit the substance author to use it.
EDIT: New license https://www.allegorithmic.com/legal/substance-share
There’s an ongoing discussion about this at the moment on the Allegorithmic forums. It looks like you will just need to credit the substance author to use it.
EDIT: New license https://www.allegorithmic.com/legal/substance-share