Yes, and on version 1.0 it was even worse. The menu where you pick characters used to have no fps limit and use up 99% of gpu power. As for the game world... My suspicion is that 0 coding experience people have no idea what they're doing and simply put all game objects + textures without thinking twice.
Let's say grass bush uses 1MB of Vram, coder who know what he's doing will use pointers to that object and for 1000 of bushes he'd end up using 2MB or so Vram. Coder who has no idea what he's doing, will keep creating new objects for 1000x times and end up using 1000 * 1MB = 1000MB of Vram.
Also they just copied 90% of Koikatsu code. Thing is Koikatsu had many relatively small zones so it worked fine. Meanwhile in AiComi we have 1 big zone and... well it is what it is. I'm pretty sure you have no performance issues in class, cafeteria or in free play.
This is because:
1. Their policy of always opening job recruit for fresh new graduates rather than experienced coder. Untrained fresh graduates doesn't know how to effectively and cleanly optimized their game codes. They only know how to code properly, not knowing yet how to optimize it. It's up to their senior to train their junior how to optimize things unique to their own codes and environment, BUT:
2. Apparent lack of knowledgeable senior programmer. I don't know if someone remember, but when Jinkou Gakuen 2 launches in 2014, it plays well with most middle class GPU at that time ( I use 780 GTX and it plays very smooth), only stutter when there is gazillion of girls came in one screen. When 1050 came few years later, I play AA2 with it and have no hiccups since. Then came koikatsu in 2018 and performance tanked. 7 years after and they still can't make it fast and snappy like AA2.
My suspicion is that they just doesn't have enough money to hire -and KEEP- senior Unity programmer knowledgeable enough to optimize their games.
Has Illusion Illgames figured out butt cheek physics yet? Or do I need to wait a few years for someone to mod it in like in the KK games?
Illusion of the past have a "Tech" pages on their website when they brag about their milestones of creating new innovation on their games, be it a skin shader, new animation/physics system, or a better boobs bouncing system. Illgames of the present have no such things.