Sacred_Sage
For a game of this size and artwork in this quality, using webp is kinda pointless.
Especially considering it's considerably slower to unpack a webp than fx a jpeg. They are smaller, so they load faster, but on a disk they will be slower.
Also, you really don't gain that much. Maybe your 2,2 GB game folder would be 2.8-3 GB instead because your compression is likely minimal.
I tried to compress images\paige\paige_cooks_topless\paige_cooks_topless5.webp to jpg in 80% and 90%.
In 80%, it is 240 KB smaller than the webp. There is a little quality loss, but it is hardly visible.
In 90%, it is about 25 KB larger. That means your game would be 2,3-2,4 GB instead of 2,2 GB.
I think it'd be worth it to consider the use of webp, as it is specifically meant for websites and not games. Your call but it does slow down a game because renpy is Python 2.7 which is slow as it is.