I think you can set animation time, try that. Yes, takes some time to load 3d from files, so the usual solution is to have some kind of loading screen cover the models as they load.
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Sorry as I'm a little new to this but where do you set the animation time? I saw set/delete node, blend time, animation speed, rate, pause and resume animation. Since the object keeps looping non-stop, I just want to restart the animation whenever I wanted it to. I'm sorry for being so bad at this. 😔