Glass material: object shown with strange artifacts I have an object that I've built using many circles, and then connecting the edge loops between them. I've tried to apply a glassy material, playing with transparency values, but the problem is that the parts where there are the circles are drawn differently:  



I've already adjusted the normals. How could I eliminate these artifacts?

Update

There are no faces inside the edge loops. This is how the mesh looks in edit mode:
It looks to me like there are still faces left inside your mesh.
Like this:

What you need to do is delete those inside faces.  This can be done by just selecting the center vertex of each circle and hitting X on the keyboard and then selecting delete vertices.  Your final clean mesh should look like this:



Hope this helps!