I have this section of a cylinder and I want to duplicate it around a central point to make a whole cylinder. What is the best way to do this?
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2$\begingroup$ You could either add a mirror modifier in X and Y axis, enter edit mode and duplicate it with Shift+D, or select one of the end vertex and spin it it with Alt+R. Then just extrude it upwards $\endgroup$– Duarte Farrajota Ramos ♦Commented May 11, 2016 at 1:33
1 Answer
Use Extrusion and the Mirror Modifier
Extrusion
If it is just a segment, first Tab into edit mode, rotate to front view (Numpad 1), key E, then Z, and drag the mouse downwards to the desired height for the cylinder.
Mirror Modifier
With the cylinder selected, go to the Object Modifiers tab in the Properties panel and add a Mirror modifier. Set the settings as follows:
This will reflect the segment about the origin (the orange point with the green and red arrows coming from it).