This is a calibration error. If your HB2 looks "under water," you have your Damping set above 0.60 and your Friction below 0.30. You are negating the "Snap-Back Decay." Lower your Damping to 0.40 and increase your Linear Drag. The result is not underwater; it is powerful .
If the bounce is bad on the first loop, it is unbearable by the 50th. heavy bounce 2 pmv better
In this article, we are going to break down why the "Heavy Bounce 2" physics engine is superior to its predecessors, why it specifically dominates the PMV genre, and most importantly, What is "Heavy Bounce"? A Technical Primer To understand why "Heavy Bounce 2" wins, we have to look at the problem with version 1.0. This is a calibration error
PMVs (Porn Music Videos) are a brutal testing ground for physics. Unlike a narrative film where you can hide bad physics with a cut, a PMV relies on looping, rhythmic, high-contrast motion synced to a beat. The viewer is often watching the exact same bounce happen 128 times over a three-minute song. The result is not underwater; it is powerful
If you have spent any time in the niche corners of the 3D animation, Source Filmmaker (SFM), or adult gaming communities over the last 18 months, you have seen the debate. You have seen the forum threads, the Patreon polls, and the Discord arguments that get surprisingly technical.
Traditional soft-body physics in programs like Blender, MMD (MikuMikuDance), and early SFM relied on what engineers call "linear restitution." In layman's terms: things bounced back too fast. A hip or chest would collide with a surface, and the "bounce" looked like a rubber ball hitting concrete—snappy, fast, and without mass.