Back porting the asset fix for the sample code.

Assets/Materials/XMaterial.mat.meta

 fileFormatVersion: 2
-guid: f7bf7884e65c546bb89d4e3e0aef2ae9
+guid: 1d85e66239f5b41eb87246c413157610
 NativeFormatImporter:
   externalObjects: {}
   mainObjectFileID: 2100000

Assets/Prefabs/JointLineRenderer.prefab

   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: 2100000, guid: 1d85e66239f5b41eb87246c413157610, type: 2}
+  - {fileID: 2100000, guid: 7c57bb7614d2746e4a2cc322b1174d39, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0