Weird lines in Cylinder I am trying to make a cake stand. Here is what it looks like:

And here is it in wireframe:

The thing is, when I use a reflective material, I can see these lines running along the face of the cylinder and I can't seem to get rid of them (I've tried adding additional edge loops to no avail):


To be specific, I'm talking about the lines that kind of look like the old Japanese flag:

What are these and how do I get rid of them?
This is called pinching. This happens because you have single vertex with a lot of edges.

You can improve it by deleting the vertex and adding a n-gon in the middle.

This is not ideal solution in every case because there is the n-gon in the middle but for rendering it works quite well.