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Attached is a photo of a model. I went to Add > Mesh > Circle. Then went to edit mode, selected all vertices and extruded up. I can achieve the same result by drawing a bezier circle and converting to mesh first. I want to to the exact same thing with a square (at first) and then other complex shapes made from just lines. I'm unable to do a square. I tries grease pencil but just doesn't do what I'd expect it to. When I convert it to a bezier curve there's it always misses an edge and hence isn't a full square and it doesn't extrude like this.

enter image description here

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  • $\begingroup$ I'm not sure to understand, do you mean you are unable to extrude up a square? $\endgroup$
    – moonboots
    Commented Dec 9, 2021 at 12:18
  • $\begingroup$ @moonboots do you see the circle in the image. The same thing but instead of a circle it should be a square. I cannot draw a square $\endgroup$ Commented Dec 9, 2021 at 12:32
  • $\begingroup$ so what about create a plane, delete the face only in order to keep the edges, then extrude on Z? $\endgroup$
    – moonboots
    Commented Dec 9, 2021 at 12:34
  • $\begingroup$ Yes, that works for a square but then I want to able to do that with any shape after that. Like a pentagon or a random curve $\endgroup$ Commented Dec 9, 2021 at 12:47
  • $\begingroup$ you need to do the same: draw the shape, either a curve (that you'll convert to mesh) or a mesh, then extrude up. For a pentagon create a 5 vertex circle, etc $\endgroup$
    – moonboots
    Commented Dec 9, 2021 at 12:48

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I am not sure I understood what you want to do exactly and I am really new to it but I would go as follow:

  • create a cube with the heigh/thickness (Z axis) that you'd like
  • edit mode, face selection
  • Deletion of top and bottom faces of the cube

You should arrive to this, and can always manage your object thickness on the Z axis in Object Mode with your Scale option/cursor. On the picture I am on Edit Mode, Edge select.

enter image description here

From there on, I would add vertex on edges as followed: Add vertex on edges

Like this you have a square bottom side and you can get more complex with the other top side.

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  • $\begingroup$ Hi, Thank you so much. That works for a square, but what if want to do that with any random shape, a pentagon maybe or a pentagram or an irregular curve. $\endgroup$ Commented Dec 9, 2021 at 12:33
  • $\begingroup$ For pentagon, I would create it from a cylinder mesh with 5 Vertices. Then delete bottom/top faces. And work out one side. Pentagram, I would create a hexagon (10 vertices) from the cylinder mesh. Delete top/bottom faces. Select with shift every other edges and move them around as I wish with the shrink/fatten tool + edit a side. For irregular curve, I would start from an edited circle that I would extrude and then edit the other empty face. The best would be to be able to create two separate surfaces and them join them together. But this I don't really know how to do it yet. $\endgroup$
    – Arnaud
    Commented Dec 9, 2021 at 13:21
  • $\begingroup$ Thanks a lot. This would help out a lot. $\endgroup$ Commented Dec 9, 2021 at 13:29
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    $\begingroup$ You can make square, triangle, penta, hexa... all kind of these circular formations with Circle as well, you just need to set number of vertices to 3/4/5/... instead of 32 that are set by default $\endgroup$
    – MikoCG
    Commented Dec 9, 2021 at 14:41

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