Previous versions relied on static bone mapping. V15A introduces a dynamic gravitational influence based on character posture. When a character leans forward in V15A, the mesh reacts with a delay curve that mimics actual tissue density—not just a linear drop.

The update includes native collision mapping for over 30 new armature types. Specifically, the "Underboob Vertex Shield" prevents the common bug where arms clip through the lower hemisphere during idle animations.

The reaction on the forums has been split down the middle: