R6 is out:
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Pretty sure it's been out since April
Can anyone explain how this game differs from base koikatsu?
Koikatsu is a made game. This is an engine to make your own, but no walking around or fully controllable characters. It's a VN engine, so you set the camera, pose the characters, add a speech bubble, type what they'll say, and choose music and lighting options. Girls have voices, guys don't (if you try to give a guy a voice, it'll end up being female).
H-Nodes are the actual animations, but only sex animations, and you pre-adjust each stage in a poser. There are loads of pre-made animation stages. In the character creator, you can create anything from a giant amazonian to a tinkerbell pixie in the palm of your hand, but that pixie gonna see sum clipping 100%. Posing in H-nodes is hard AF cuz every pose has its own default motions.
Maps include the whole school from Koi, but it's not some map you can roam around in. You choose the general area you want girls in, and add them to that scene. There's also a doctor's office, director's office (mod), shower, lockers, bathroom, church, swimming pool, storage closet, etc etc, and you can make your own map, but it takes dedication. You can also add to pre-made maps. I built a lab in the academy.
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Note: Updating (like using the menu Update option) will remove some mods, like a specific hair mod I had for example, but simply dragging mods from your old mods folder to the new mods folder,
after updating, and
not overwriting, should solve that. That's what I did. Nothing broke from what I've seen after months of daily playing. Therefore, back up your mods before updating so you can replace anything that goes missing during update, but don't overwrite, or you'll just take updated mods back to their old version.