I'm a hobbyist prop artist and give away everything I make for free, even for commercial use. At the moment I use the CC BY 4.0 license which is great except for the fact that someone would be able to download my assets and sell unmodified for a profit.
Ideally, I would like a license where you are free to download and use my assets for free but can only be used for commercial purposes where the assets are not the primary focus of the product e.g. included as part of a game.
Does anyone have any experience here about how best to achieve this?