SpringFX - High-Performance Bone Physics V8.4.4

Real-time spring and jiggle bone physics for Blender 4.5–5.2. Compiled solver, collisions, VRChat PhysBones export and zero scene clutter. Identical results on Windows, macOS and Linux.

High-performance bone physics for Blender

Course Curriculum

• About

• FAQ

• Documentation

• Ratings

• Windows, macOS and Linux. The compiled solver now ships for all three, including Apple Silicon and Intel Macs.

• Blender 4.5 LTS to 5.2. Intel Mac users, who can't move to Blender 5, get full support too.

• Identical simulation everywhere. The same rig produces the same motion, bit for bit, on Windows, macOS and Linux. Verified by automated tests on every platform before each release.

• Zero footprint. No extra objects, no drivers, no constraints. Your .blend stays clean, even with location springs enabled.

• Fast enough to forget it's running. A compiled solver steps the whole rig once per frame. Measured: 0.537 ms per frame with collisions active.

• Collisions that hold. Segment-based collision with multi-pass resolution against bone, sphere, capsule, plane and mesh colliders. Zero penetrations across thousands of controlled test samples.

• Predictable, repeatable motion. A stable analytical integrator and bit-exact determinism: scrub, replay and re-bake and you get the same result every time.

• VRChat PhysBones export. Tune the motion in Blender, validate it, then export the settings: endpoints, radius curves, colliders and angular limits. No bake needed: the settings travel, not the keys.

• Organised by groups. Hair, tail and ears each get their own renamable group with their own settings and presets, all from one list.

• Bake when you're done. Bake to keyframes with optional pre-roll warm-up for clean loops, then add post-bake noise. Existing animation on other bones is left untouched.

• Deep control when you want it. Per-axis stiffness, chain falloff, lag, air drag, wind with turbulence, self-collision and viewport/render precision.

• VRChat and VTuber avatars

• Character animation where clean, linkable rigs matter

• Studios and teams working across Windows, macOS and Linux

• Game characters that need secondary motion tuned before export

• Or install from disk. Download the zip and drag the file onto Blender. No account connection needed.

• Seeing "not found in the remote repository" when you drag? Your Superhive repository in Blender has no token yet. See the FAQ and Documentation for the 1-minute fix.

• Full/Pro Everything unlocked: location and rotation springs, collisions, wind, groups, presets, baking, VRChat PhysBones export and the compiled solver for Windows, macOS and Linux. Blender 4.5 LTS – 5.2. Free lifetime updates. $15 $20

• Free Try SpringFX in your own rigs before buying: rotation springs on up to 10 bones. Upgrade to Full for collisions, wind, groups, presets, baking and PhysBones export. $0

Compatibility & Requirements

• Blender 4.5 LTS – 5.2

• Windows (x64), macOS (Apple Silicon and Intel), Linux (x64)

• Any armature — works with linked rigs and non-destructive pipelines