He's using Paper2d. I think he draws the frames by hand and bakes them in to Paper2d so it's a lot of work which might explain why the Ice Cream Lady from Sunset Bitch is back in Cunniversity but has a different name. The exceptions are for some minor scenes like with Marika floating, where he animates it in Unreal and Deep Space because the sprite sheets in deep space are very different compared to the normal sprite sheets in other games.
What version are you running the game on? I did read that the game (and his other games) might not work in some versions.
Yeah, I know he did that before in other games he made a while ago, months ago. What I meant is, if you play as male, then all the girls are just female (non-futa), and if you play as female, then those same girls are all futas. Same map, same game, just different version. Keeps both routes consistent without mixing the two.
Paper2D is just Unreal's way of rendering 2D sprites / frames - it doesn't tell us what he's using to create them.
Most of Bambook’s games use hand-drawn animations. That means each frame of movement is drawn out like a flipbook and then exported into a sprite sheet. When you look at the files, you see rows of full poses, one after another. Below is an example from Ero Ring. They're much more expressive (and also look better in my opinion) but they take longer to do which is why he sometimes uses rigs
The sprite sheets are the giveaway that he did hand-animate them. Those frames aren’t just the same parts rotated — they show redrawn motion, squish/stretch, and pose changes you can’t get from a rig alone. In the older games he really did animate them frame-by-frame, then export to sheets. Deep Space switched to part-based atlases, and in some of the newer games (Ero Ring and Cop bang for example) it’s engine rigs on top of a static drawing to save on memory — but the sprite sheets prove he is doing hand-drawn animation.
That's actually not true - Squish / Stretch are all part of 2D Rig Animation. Spine2D has soft meshes and physics. Doing hair / breast jiggle physics is really easy although I doubt he's using physics, but I do think he keyframes the squish and nipple motion.
The redrawn poses are probably just separate rigs / poses. Each pose has a unique sprite sheet of frames. He's got the Side walk animation (which he flips) then the standard "idle". There's zero transition from one to the other. It's a binary swap.
Spine can fake squish/stretch and export sheets, but Bambook’s older games don’t look like rig exports — those sprite sheets have redraws and in-betweens that rigs don’t naturally give you. Deep Space (and a few cases like the Bride in Wedding Rings) experimented with atlases + engine rigs. And now he’s using a third method: a single base image rigged in-engine, which he confirmed himself with Marika’s idle sprite (the one where she's hanging in the air and not the one standing up) — “this animation is in fbx format, not gif format. It is played only in the game engine. I sometimes make simple animations in fbx format to save memory.”
You could either check out the gallery archive link below or ask someone to give you their save files.
