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I'm trying to model the image of this control knob which has a curve to it. I start off with a cylinder as shown in the example I've attached. select 4 vertices and make a face in the middle of the knob. But I also make another 2 faces left and right so I can make the bevel. When I select the edges and do make the bevel, as seen I'm getting some odd mesh result appearing. Is this the correct approach to model the reference image?

Thank you.

enter image description here

enter image description here

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  • $\begingroup$ Add a Subdivision Modifier. You will likely need to create a small extrusion to the top to keep it flat. $\endgroup$ – rob Oct 23 '19 at 10:57
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You could do it this way, you need to extrude, mirror, bevel, cut, join...

enter image description here

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  • $\begingroup$ Hi Moonboots, Thanks for your example, that control knob looks awesomely modelled. I'm just a confused how did you make the join faces, I cannot figure it out, so I can continue on. if it's not much of a hassle for you, and do find free time, could you please do a quick demo tutorial how you made this. Kind regards. $\endgroup$ – graphomet Oct 24 '19 at 5:49
  • $\begingroup$ what join faces are you talking about? After the bevel you just need to join some vertices (J) and delete some edges (X > Dissolve Edges) $\endgroup$ – moonboots Oct 24 '19 at 7:54
  • $\begingroup$ I thought I had uploaded the image.... Here is what's confusing me. The second step: ibb.co/NLKxbZ3 How did you get the quarter Cylinder? $\endgroup$ – graphomet Oct 24 '19 at 8:47
  • $\begingroup$ I made some progress, I figured out the mirroring, and would like to know how you got the shape which is within the red rectangle. ibb.co/tBHmX6v $\endgroup$ – graphomet Oct 24 '19 at 10:55
  • $\begingroup$ you need to select the edge on the corner and bevel with ctrl B ;) then you'll make some manual corrections: zupimages.net/up/19/43/bmd1.jpg $\endgroup$ – moonboots Oct 24 '19 at 11:08
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Try dissolving the coplanar faces (the vertical side and the face on top of it). Worst case scenario you could do it with a boolean operation on a basic cylinder and the knob profile.

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