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Why not EvaluateGlobalTransform at render stage?

Hello! I'm trying to deal with FBX format and FBX SDK, importing fbx into my engine. I'm reading node by node, gathering their transform matricies. Then, during render process, I will have to apply eache appropriate matrix on eache node, walking through the node's hierarchy. But is it a right way? Why not using "cluster->GetLink()->EvaluateGlobalTransform( Time) " at render stage? Will it be slower? Does it apply interpolation between frames?

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