So in the image below there are two circles, how can I remove the internal vertices between them without messing up the outside shape. I'm working on a gun and this is just a simple way to illustrate the issue I'm dealing with. If I where to go in and delete the internal faces it would leave holes on the outside of the object, is there a fast way to get around this?
Assuming that you are using a release of Blender that is at least 2.77 or newer, then you can use the edit mode boolean tools and save a couple steps.
First select one element of the object in edit mode by linked geometry by selecting a face, edge, or vertex, and then press L with your mouse hovering over it.
Press Spacebar and type Boolean and select Mesh: Intersect (Boolean) from the menu, or press Enter when the option appears in the menu.
- Next, press F6 to bring up the options for the tool (or go to the operator panel in the toolshelf) and change the mode to union.
You can use the boolean modifier. In order to use it, you first have to seperate the spheres into seperate objects. Go into edit mode, select everything with A, press P and click By loose parts.
You now have 2 seperate spheres. Go back to object mode, select one of the objects and add a boolean modifier.
Select the other object under the object drop-down menu and change operation to union.
Do the same thing for the other sphere.
Now you will have two objects, one for the two spheres combined and one for just one as shown below:
Select the object which has both spheres and Apply the modifier by clicking on Apply.
Now delete the other object of just one sphere by selecting it, and press Delete.
And will now have an object with the shape of both spheres combined, but without the interior geometry as shown below: