Extruded Polygons won't display smooth!!

[fr3drik]

Sounds really strange, try to click the options box both when creating the cylinder and performing the extrude and make sure to "reset settings".

If that doesn't work for you, try playing around with "set vertex normal" and "average normals" under edit polygons -> normals.

[mindful108]

You can set the overall smoothing by selecting your object, or particular faces, and choose Edit Polygons>Normals>Soften/Harden. You can also create two shelf buttons with this MEL.

For all smooth edges.
polySoftEdge -a 180;

For all hard edges.
polySoftEdge -a 0;

Once you have applied the Normal Smooth/Harden you can select the polySoftEdge node and adjust the smoothing angle (or do it in the options box as you set it from the menu path above). If you set it to about 89 degrees then you will have smoothed edges but keep hard corners. You can also just adjust the polySoftEdge node interactively by selecting its Angle attribute in the Channel box and using the middle mouse button slide to adjust in the viewport.

It can also just be a case of needing more detail in your model if you are not happy with the smoothing at render time.

Hope that this is what you are looking for...

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