Why does Character Movement stutter going up stairs?

Max Step Height too low for the stair riser. CMC tries to step up; if step exceeds Max, it bumps and slides. Set Max Step Height = stair riser height + small margin (e.g. 18cm for typical stairs).

FCharacterMovementParams::WalkableFloorAngle and the floor probe distance. Tune in concert with Max Step Height; both determine grip on slopes/steps.

Enable Movement Smoothing on the SkeletalMesh component for visual interpolation between physics steps.

Fix: Unreal Character Stutters Going Up Stairs

Quick answer: CharacterMovement → Max Step Height = stair riser + 2cm. Walkable Floor Angle 50°. Enable mesh interpolation.

Player runs at staircase. Stutters at each step. Default 40cm Max Step Height fights with 18cm risers.

The Fix

CharacterMovementComponent:
  Max Step Height:               20     // cm
  Walkable Floor Angle:          50
  Floor Walkable Trace Distance: 100

SkeletalMeshComponent:
  Movement Smoothing:            true

Step Height matches stair pitch. Floor angle generous enough for ramps. Mesh smoothing hides residual sub-tick motion.

Verifying

Run up stairs: smooth visual. With default Max Step: visible stop-go.

“Step matches riser. Smooth glide.”

Related Issues

For Vehicle substepping, see vehicle. For Cloth simulate, see cloth.

Step matches. Smooth.