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Introduction

Thanks for picking up Spline Juice.

Spline Juice adds game juice to any static or animated skeletal mesh in Unreal Engine in a few seconds: make it pop in on spawn, wobble, breathe, squash and stretch, melt, or assemble from pieces. Pick one of 16 built-in presets, click Apply, and the plugin generates the deform materials for you, so there is no material editing and no C++.

Under the hood it is a visual-only spline mesh deformer driven by World Position Offset (WPO). The geometry travels, follows the curve, and squash-stretches like cartoon “juice”, while the actual actor transform, mesh components, and collision never move.

Real transform / collision  →  stays exactly where it is
Visual surface (WPO)        →  flows, squashes, stretches along the spline

Because the whole effect lives in the material’s World Position Offset, it’s purely cosmetic and fully reversible: at rest the mesh sits in its original pose, untouched.

What it does

Section titled “What it does”
  • Presets: 16 ready-made effects (Pop In, Grow From Ground, Idle Breathe, Wobble, Squash & Stretch, Goo Drip, Cannon Burst, and more), plus a Bounce Settle modifier you can add to any of them.
  • Static and skeletal meshes: skeletal meshes keep playing their animation while the deform layers on top.
  • Path travel and spline-follow rotation: slide a mesh along a spline from start to rest, banking to follow the curve.
  • Behavior curves: stretch, size, squash, wobble, inflate, shake, melt, bulge, and twist, each driven by an editable curve.
  • Group Stagger: play a whole selection as one choreographed wave.
  • Assembly along the spline (optional): a static mesh explodes into pieces and reassembles as it moves.
  • Saved presets: capture a look once and apply it to any number of actors.

Everything is driven by editable curves, so the timing and shape of the motion stay entirely art-directed, and every preset stays editable after you apply it.

What’s covered

Section titled “What’s covered”