Hi Yal! I was interested in purchasing this Engine but had some questions about the licensing. I understand that you allow any games built with your "Stuff" to be legally distributed for free or commercially; but I was a little confused about section 22 of the licensing document, which states the following:
"Games and such made using Yal Stuff is considered to be derivative of Yal Stuff, not each other."
Is this essentially saying that any game's built off of your Stuff MUST be attributed as derivative works of your Stuff? So, as a hypothetical, if I were to build a game using this engine as a base, I have to attribute it as a derivative work of your original engine (in the credits for example). And then years later if I made a sequel to this game built off of the work of the original title, I still have to attribute that eventual sequel as a derivative work of your original engine?
Also, for the second part of this section:
"Modifications made to Licensed Stuff in order to produce a derived work must be authorized by the intellectual property rights holders in possession of every intellectual property or license used within such modifications."
This is simply stating that if a work is produced using your "Stuff", the developer has to have legal ownership or permission to use whatever other assets or concepts they put into it (so, for example, if one was to develop an original title this point would be moot since they would obviously hold the rights to all of their own ideas.)
I just wanted to ensure I understood the legality of your software before purchasing it in case I ever end up making something with it in the future. Thanks!
Edit: Also, just to be doubly sure, this asset is considered a "Resource Licensed Stuff" as stated in section 2.2 of the full license; NOT an "Executable Licensed Stuff" as state in section 2.1, right? I know the latter can't be used in commercial projects while the former can, so I wanted to make sure.