It took me a year to do it, but I was working on it intermittently, sometimes dedicating full-time hours, and other times not at all. So it’s quite challenging to determine exactly how much time I spent on it
Good idea, just a bit of a card
nice project! love the animations and little things to discover.
i basically just bumped into this by accident, but we added a new feature to drei yesterday called MeshPortalMaterial, it will make stuff like this almost too easy:
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Nice! If only this helper had existed earlier 
james_Hall your Too good man in this ! can you help me out, some project