For Blender: go in Edit mode, Selevt all faces, press ctrl + T I found another way to Solve this, this should work with all Editors:Ĭonvert all Faces in faces not larger than 3 edges. For more details on what you can and cannot do with my work, see here. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. You can switch the orientation of the normals manually in Blender – here is a tutorial. You will see the problem in Pepakura by two sets of faces, one showing the texture (or face color) on the “outside”, and one showing it on the “inside” (double quotes, as technically there is no such thing as in and out for a model with openings). In such a case, Blender may fail to orient all faces properly. However, there are some models which do not enclose a space completely, but which contain openings. In most cases, ctrl+N solves this problem automatically.

If a model consists of a contiguous surface where the normals of some faces are oriented differently than those of the other faces, Pepakura assumes that the surface isn’t actually contiguous (and rightly so). Since the face has two sides, the normal can point in either of two directions. The so-called normal is a vector perpendicular to the plane of the face. You can think of it as the “front” and “back” of the face. The problem in this case is that each face of your model has an orientation. Go into Edit Mode, select everything (press A), then press ctrl+N. If the problem still persists, you can recalculate the normals. Then press alt+M in order to merge the affected vertices. If that doesn’t help, in Edit Mode press ctrl+alt+shift+M. To fix this, go into Edit Mode, then press A to select all vertices, then press W and “Remove doubles”. that two vertices are positioned at the same location. One is that one or more vertices are duplicated, i.e. These show up as red lines and result in a model where two faces are not connected although they should be.

Sometimes it so happens that a seemingly perfect model in Blender has unconnected edges in Pepakura.

I work with the combination of Blender and Pepakura for creating paper models.

Tutorial pepakura designer