Im trying to create a cyclinder with the bottom and top rounded but when i use the Sub divison modifier it leaves these creases at both ends and if i use a loop cut to smooth it out it makes the object to flat at both ends and not rounded how can i fix this?
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Related - https://blender.stackexchange.com/questions/734/how-to-smooth-shade-an-object-while-retaining-hard-edges – Mr Zak Nov 01 '15 at 20:38
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@MrZak I think he is trying to not have sharp edges. – PGmath Nov 01 '15 at 21:30
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@PGmath yes, probably it was better to say the main thing is topology. – Mr Zak Nov 01 '15 at 21:36
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Those ugly creases are caused by the n-gon cap. The Subsurf modifier works best with quads and doesn't work well at all with n-gons.
Here are two alternate methods of filling the cap which produce quads, and thus much better subdivision modeling.
The first example was made by selecting the n-gon face and then hitting E (exturde) and then S to scale the extrusion inward. You could move the extruded part up to make the top less flat.
The second example was made by joining half the opposing vertices, making a quad fan. This could also be done by using the Grid Fill option. Again, the central vertex could be lifted up to make the top more round.
PGmath
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