Why don't traces hit my character's hand bone?

Physics Asset auto-generation skips bones below size threshold (small bones like fingers). Add Bodies manually in Physics Asset Editor for needed bones.

Physics Asset Editor → right-click bone → Add Body. Pick shape (Box, Sphere, Sphyl). Position around the bone visually.

Auto-generation settings?

Skeleton import → Physics Asset Generation → Min Bone Size. Lower for thin characters; raise for stylized; rebuild PhAT.

Fix: SkeletalMesh Per-Bone Collision Missing

Quick answer: Physics Asset Editor → right-click bone → Add Body. Set shape and Collision Profile.

Hit detection on character. Hand traces miss. Hand bone has no Body in Physics Asset.

The Fix

Open SkeletalMesh's PhysicsAsset (PhAT):
  Right-click hand_l in tree:
    Add Body (Sphyl, length 5, radius 3)
    Adjust position to fit visually
  Save Physics Asset

  Body Details:
    Collision Profile:    PhysicsActor (or BlockAllDynamic)

Each added Body extends the rigid skeleton; traces hit the bone via the body. Refresh component on running character.

Verifying

LineTrace at hand: hits, BoneName = hand_l. Without body: misses.

“Add bodies. Bones tracable.”

Related Issues

For physics asset trace, see trace channel. For collision channel, see trace default.

Add bodies. Bones detect.