I'm fairly new to blender. I want to design a somewhat complex model, that I can later print with a 3D printer and possibly use for WebGL as well. Before I start, I wanted to clearify that I'm actually joining the meshes together properly and that overlapping and duplicate lines are acceptable.

I'm using the 'honeycomb' mesh that comes with blender as the base:

honeycomb mesh

I applied the array modifier to the mesh and set the X offset to 0.765 so it lines up properly:

enter image description here

From what I understand, the blender instead of 'extruding and copying' the honeycomb pattern, it 'stacked and copied' the pattern, in other words - the line that connects the original honeycomb mesh to the honeycomb copies is actually two lines overlapping each other at exact location.

In edit mode, if I 'click' once select and drag the points around, I can see there are duplicate lines:

enter image description here

Is there a function where Blender can remove this duplicate lines and recreate the mesh by 'joining' the points 'cleanly' and removing the duplicates so it's connected cleanly like the original honeycomb mesh?

My question is: Will this kind of mesh cause me any problems if I would want to 3D print it or use it for WebGL? is this considered bad design or is this mesh perfectly acceptable?

Another example, if I take 2 cubes, overlap them and ctrl+j(oin) them, is this a proper model, or do I need to redesign it, so there are no overlapping faces? Thanks!

enter image description here

  • $\begingroup$ In Edit mode W > Remove Doubles that's a pretty obvious one. You'd be advised to remove the duplicate faces before arraying though $\endgroup$ – Duarte Farrajota Ramos Oct 27 '17 at 18:46
  • $\begingroup$ You need to delete those points that will overlap if you are using an Array Modifier. To help visualize this remove the array modifier, select your mesh, duplicate it and drag it over until it lines up. You will see that those vertices will overlap... $\endgroup$ – Dontwalk Oct 27 '17 at 18:48
  • $\begingroup$ @DuarteFarrajotaRamos not sure if I understood. The original honeycomb doesn't have any duplicates/overlapping lines, they are created by the array modifier and after applying the array modifier and 'Remove Duplicates' I get 'Removed 0 vertices' ( I selected all the points ctrl+a). $\endgroup$ – Kristian Oct 27 '17 at 19:02
  • $\begingroup$ Array modifier has Merge and First And Last options designed specifically to solve the problems of overlappng duplicated geometry. Note that in general it's easier and more flexible just remove it in the first place to avoid the problem from the beginning, still it's possible. Remove Doubles doesn't necessary delete all the doubles at once; probably the vertices will be far enough to not fall under threshold of the operator. $\endgroup$ – Mr Zak Oct 27 '17 at 19:02
  • $\begingroup$ @Dontwalk thanks! I understood the problem, but does that mean if I set array modifier count value to 100, I will have to edit the mesh manually and select/delete/re-join these overlapping lines 100 times? or did I misunderstood something $\endgroup$ – Kristian Oct 27 '17 at 19:04

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