It’s interesting to me too. Although I do not plan to release games on the UPBGE engine.
If I understood this thread correctly. If my product contains code licensed under the GPL, or modified code that was under the GPL, then I must distribute the SOURCE CODE or a link to it along with my product.
But the source code of what, UPBGE Engine?
Or the original file of the UPBGE Engine with the scene of the game?
I think that only the code of the UPBGE Engine. Because whatever I do inside him, it will be done with the help of his tools, like an image or a video. I am not changing the engine code.
If I change the engine code, then I will have to post this modified code, because it will also be a GPL. And if addons are used, then the source code of the addons?
Am I getting it right? Or should I publish the original game scene file?
I wonder if it is possible to independently change the license from GPL to another closed one?