Why does the "skin" modifier not accurately produce 90°corners?

Question

My current design is comprised of a single path of vertices, defined by vertical and horizontal edges linked by 90° corners. Applying the skin modifier to this path of vertices creates perfect rectangular segments, but the corners display concave artifacts.

Any suggestions?

Gorgious · Accepted Answer · 2020-05-25T11:43:58.900

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I suggest using a combination of Screw + Solidify modifier (your base mesh must be flat for the best result) :

Screw : Along Z, 1 step (If using Blender < V2.83, the minimum steps is 2. Make sure the angle is 0°), Remove smooth shading

Solidify : Complex mode, offset 0

If you want to have the height centered around 0, simply add a displace with a driver :

Result :

Add custom properties if you don't want to deal with the modifier interface :

edited May 25 '20 at 11:43

answered May 25 '20 at 06:51

Gorgious

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More parametric goodness from Gorgious : ) .. are you enjoying Houdini? – Robin Betts May 25 '20 at 08:05
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@RobinBetts Didn't have much time to use it !! But definitely having fun with the first few tutorials :) – Gorgious May 25 '20 at 08:56
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Nice use of the Screw modifier, I'd have never though of that – Duarte Farrajota Ramos May 25 '20 at 11:25
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It is also a nice way to create walls from .dxf in arch viz – Gorgious May 25 '20 at 17:11
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This is a perfect solution to my question. Thank you so much for the detailed walkthrough. – dman May 25 '20 at 18:07

score 4 · Answer 2 · answered May 25 '20 at 07:58

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If your path is flat, then making it a poly-curve, then setting it to 2D and object-bevelling it in its Geometry panel with another, square, curve, will produce perfect mitres at the corners.

answered May 25 '20 at 07:58

Robin Betts

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Why does the "skin" modifier not accurately produce 90°corners?

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