1
$\begingroup$

I'm learning Blender for a university course, although I already have a few years of experience on 3DS Max. I'm having a problem with the subdivision surface modifier.I have this low poly mesh:

enter image description here

I want to smooth it out, since it only has 8 sides, so I applied the subdivision modifier (it's the only modifier on the mesh and I only increased the subdivision count, I didn't change other options), but I end up with this result:

enter image description here

See how the mesh bends instead of remaining straight? I can't solve that issue. In 3DS Max, a mesh like this, withoud a bottom cap, would have had many more sides added to it (becoming a better cylinder) but the tube sides would have remained straight. I tried: adding various horizontal support loops, maxing out the creasing amount on the bottom edge, closing the mesh and beveling the bottom corner, but I still get that pin cushion effect. Creasing the vertical sides makes the lines straighter but end up with a smoother octagonal shape instead of a cylinder like I want. What am I missing?

Improve this question
$\endgroup$
  • 3
    $\begingroup$ To keep straight vertices you need to mark creases. Read: how to smooth shade an object while retaining hard edges $\endgroup$ – user1853 Jun 23 '19 at 1:36
  • $\begingroup$ I already tried creasing the bottom row of vertices and it doesn't works, as I said in the op $\endgroup$ – Paul Jun 23 '19 at 2:07
  • $\begingroup$ I added an answer that could help. $\endgroup$ – Lukasz-40sth Jun 23 '19 at 9:33
0
$\begingroup$

One thing you might be able to do is either make your own bevels, or use the bevel modifier Like so....

I start off with your problem:

enter image description here

After using manual bevels:(after selecting everything, do ctrl+b)

enter image description here

Or you can use the bevel modifier to do it for you:

enter image description here

NOTE: Make sure you decrease the width of the bevel modifier and increase the segments to achieve better results. Experiment with this a bit until you get what you are looking for.

If something like this is happening on a cylinder what you can do is extrude the end inward by pushing e than s, like so:(if not using the bevel modifier)

enter image description here

Improve this answer
$\endgroup$
0
$\begingroup$

Subdivision surface modifier rounds the whole object as it subdivides it with the default Catmull-Clark. I would use Smooth modifier that offers more precision with vertex groups and (de)selecting axes. Smoothing, save for smooth shading, has never been a one-click thing in Blender.

Improve this answer
$\endgroup$
0
$\begingroup$

You need 2 loop cuts as shown:

enter image description here

Reasonably tight to the edge

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.