big

characters/skin_joint_helper.gd

@@ -130,6 +130,7 @@ static func update(skeleton: Skeleton3D, driven: Array) -> void:
 static func _reweight(mi: MeshInstance3D, skeleton: Skeleton3D,
 		joint_helpers: Dictionary, chain_l: PackedVector3Array,
 		chain_r: PackedVector3Array, limb_radius: float) -> void:
+	var safe_bounds := mi.mesh.get_aabb()
 	var skin: Skin = mi.skin
 	var bone_of := {}
 	for b in skin.get_bind_count():
@@ -179,6 +180,13 @@ static func _reweight(mi: MeshInstance3D, skeleton: Skeleton3D,
 		rebuilt.surface_set_material(i, e["material"])
 		if e["name"] != "":
 			rebuilt.surface_set_name(i, e["name"])
+	# Preserve an explicit conservative bound across this second mesh rebuild.
+	# See SkinLegRepair: sparse runtime Skin binds can otherwise produce more
+	# bone AABBs than the renderer skeleton contains.
+	var padding := Vector3.ONE * maxf(safe_bounds.size.length() * 0.12, 0.25)
+	safe_bounds.position -= padding
+	safe_bounds.size += padding * 2.0
+	rebuilt.custom_aabb = safe_bounds
 	mi.mesh = rebuilt