I then exported the UV layout as an SVG file so I can create the paper model the size I want in Gimp. Using only one object, you can unwrap the whole model at once and get perfectly scaled parts.ĭo not forget to set the "margin" parameter to an adequate value to get room to cut the flaps. It is needed (as far as I know) because you probably want all your pieces to share the same scale. In step 1, I said to use only one object made of several parts.
It is sometimes easier to completely separate a bunch of faces from the rest of the model. The selection of the edges to cut can be difficult. If you do not mark a cut here, you get this unwrapĪs you can see, the shaded face is no more a square. Here, the cyan edges are to be folded but they are not aligned. To get a correct unwrap, edges that has to be folded must be aligned. Select edges that will be cut and use the "mark seams" feature. The other option was to create an armature hidden inside the model but it could have been tricky and it can be difficult to print. I split the geometry in separated parts to get a more rigid result. I did it simple for a first try using many individual parts all in the same object. In this post, I will give some tips I learned when I did the papercraft harvester for my son using Blender (see )
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