How do people know what 2D shapes go together to make certain 3D shapes when sewing?

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[Edit: How do people know what 2D shapes go together to make certain 3D shapes when *making patterns.]

I know if someone wanted to sew a cube, they would cut 6 squares and sew them together. If they wanted to sew a pyramid, they would cut 1 square and 4 triangles.

But what about weird shapes like with stuffed animals? If someone had never seen a sewing pattern for a teddy bear in their entire life, how would they know what shapes to cut and sew to make the teddy bear?

(It seems simple in concept, but it’s hard to imagine how certain shapes would come together to create something like a humanoid doll.)

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Anonymous 0 Comments

This is going to seem like a slight digression, but the connection makes sense to me.

So there’s a YouTube channel called Bad Obsession Motorsports where a couple of English blokes are building a heavily modified Mini, to the point where they have custom built virtually every single bracket on the car themselves. They cut and fold bits of cardboard to fit the part into the right spot on the chassis, then flatten the cardboard out and use them as a template to cut the metal into the right shape and size, then weld it together. Sometimes there’s more than one iteration but they’ve been doing custom work for a long time so are pretty good getting it right first time.

My experience in high school sewing was essentially the same – if you look at the patterns for say a t shirt you can sort of see how it all fits together and could imagine someone with a dressmaker’s mannequin working out what shape and size each piece has to be (and even how many pieces are required) by doing a similar thing with pieces of material – placing it where it needs to go on the mannequin and using pins to take it in where required. They would perhaps mark the required shape and any cuts to get the correct fit, then unfold it all and cut/sew the individual piece of fabric to fit into the garment as a whole.

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