Hi all,
if you are also thrilled by the Game Animation Sample project and want to bring your own mesh into it, I released a short video how to do that.
Have you tried creating a child Blueprint class of CBP_SandboxCharacter instead of duplicating CBP_SandboxCharacter_UE4_Mannequin? I found that when setting the Mesh node Rendering Visible to false after creating a child Blueprint class of CBP_SandboxCharacter, the mesh animations of its child nodes do not work. It displays an unanimated idle state. You can try setting the Rendering Visible of the Mesh node in CBP_SandboxCharacter_RetargetShowcase_Mannequins to false. You will see the same result. I wonder if I’m the only one seeing this result.