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Right now I'm trying to sculpt a cylinder face that I have made with 200 vertices and a very subdivided triangle fan cap top, but this gets too laggy for my PC and it's still very ugly.

I wonder if there is a way to make a selection of an image like in photoshop and just bring out that part. I'm trying to make a coin with a logo on it to 3D print.

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    $\begingroup$ can you show an example of the coin face "texture" that you could use, just to aknowledge the complexity? eg: this could be done with displacement. $\endgroup$ – m.ardito Jul 10 '17 at 10:44
  • $\begingroup$ @m.ardito - imgur.com/a/jYnWa ; this is the image i want on the top of the cylinder. It $\endgroup$ – Angel Vasilev Jul 10 '17 at 10:54
  • $\begingroup$ And you want it to be extruded like in real life coin? $\endgroup$ – cgslav Jul 10 '17 at 11:24
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As said in comment above, this could be done with texture displacement, like this:

enter image description here

of course the provided texture is probably not trimmed enough but you get the idea.

Note: I used a default circle, then filled with about 500 vertices, then subsurfed 5 times... which brings you about 1000x vertices, otherwise your coin face will be much more rough than this... of course it's damn slow.

Another way could be to vectorize the b/w image to svg (eg: use inkscape), then import svg into blender and then extrude... then add a cylinder "body", refine, and try exporting to .stl and similar.

eg., it could end like this

enter image description here

Note:the vertices count could be somewhat smaller in this case, but as usual, the more detail, the best results. In this case you can't easily smooth using subsrf, though... you could need a lot of mesh adjustment to correct (very) bad topology.

You have to find the best settings, it also depends on 3d printer resolution, of course...

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  • $\begingroup$ Perfect! this is exactly what I wanted. I spent 2 days finishing it up to my needs and it came out perfect, but I couldn't have done it if it wasn't for you. Thanks a lot dude! $\endgroup$ – Angel Vasilev Jul 14 '17 at 12:40
  • $\begingroup$ Good! And in the end which method you used? DId it print well? $\endgroup$ – m.ardito Jul 14 '17 at 12:53
  • $\begingroup$ Sorry for such a late response. I used the 2nd method, because it allowed me to modify everything a lot more! Here is the end result after the 3D printing (newer models are more detailed) scontent-sof1-1.xx.fbcdn.net/v/t34.0-12/… Sorry for potato quality $\endgroup$ – Angel Vasilev Jul 27 '17 at 10:28

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