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I am a newbie at Blender, but love it. I am trying to create a model of a building which is to be constructed. There are several arched openings in walls. I am having a great deal of trouble being able to create these arches. I have googled but not found anything that works.

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  • $\begingroup$ You could try the Boolean modifier, but other then that it's hard to say without seeing screenshots of your model/topology. $\endgroup$
    – gandalf3
    Jan 16, 2014 at 21:59

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You could model the arch's shape from a plane and use Knife Project.

enter image description here

  • Select first the arch then the wall in Object Mode
  • Change to Edit Mode and apply Knife Project

After that you should have a model like:

enter image description here

If you want to connect the arches select them by Shift-Alt-RMB and Bridge Edge Loops

Alternativley (as suggested by Gandalf3) you could use the Boolean Modifier.

For this technique you would need to extrude the arch like the red object here:

enter image description here

  • Align the objects
  • Add a Boolean Modifier to your wall, and set operation to Difference
  • Apply the modifier

enter image description here

The result should look like:

enter image description here

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  • $\begingroup$ Tried both methods and found the boolean modifier works best for me. Much thanks for the help. $\endgroup$
    – ken
    Jan 17, 2014 at 12:52
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    $\begingroup$ @ken, would you mind marking this post as the answer by clicking the checkmark? $\endgroup$
    – CharlesL
    Jan 17, 2014 at 16:02

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