Yes DONT use Metro Theater shaders on animated characters, there is no GPU skinning code, so animation will done on the CPU where it's much slower.
If you've bought the zombies previously on the store, email me and I will send you the new character shader that is included in the upcoming Zombie Apocalypse model pack.
EDIT: You will also need the normal/specular maps for the shader to work, which I will provide as a free download AFTER the pack is released.
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"bond1 - You see this name, you think dirty."