Any clue what to call this?

I’m assuming you mean the model tweens its transparency and each part of the model ‘constructs’ itself in that animation where everything is completely random and then fits together. I know what you mean.
Most likely, they’re using TweenService to tween in the transparency. For the orientation, I’m assuming they set each part’s orientation to a completely random amount and then set their position to be slightly and randomly offset. Then, they use TweenService to tween the model’s orientation and transparency to how it is. Look into math.random() and Vector3.new() and TweenService. The end effect you get is a really nice ‘construction’ animation

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