Joining Edges and some other stuff in blender

[gooddog15]

So, I've been getting better at modeling and texturing, however there are 2 things I really need to know.

first off, how do I join multiple edges?

When I look this up online, All I find is to merge vertices, which results in this:

Also how do I extract faces in different shapes, so I can make stuff like the thruster ports on the space shuttles nose:

Edited February 22, 2015 by gooddog15

[sumghai]

You need to individually merge each pair of vertices making up the cylinders.

[CaptainKipard]

Not sure about joining all those edges. I've not been able to figure it out either. If you want exhausts like that your best bet is a boolean operation. Be careful how you arrange the operator object to take into account how many new faces you'll end up with, and you'll also need to do a lot of clean up to remove shading artefacts.

[Vashts]

quick subtraction boolean to show the ports. this isnt blender, but the concept is the same.

you would need to play with the geo a bit to make it cleaner, but there you go.

[landeTLS]

For your first question it looks like youll want the bridge operation (select the two edges and press ctrl+e and find where it says bridge) if you instead just want to merge one edge into the other edge then you can select the first edge and activate snapping (ctrl+tab and activate snap to vertex mode with active selection) now holding ctrl click twice on a vertex(making it active while keeping the edge selected) and press S to scale and hover the mouse over the nearest vertex on the edge you want to join to. The edge should snap to it. Press enter then press a twice then ctrl+w remove doubles.

You can also do it easier by applying the bridge operation as above then select the unwanted edge and press delete And dissolve edges.

for the second one youll want booleans. Refer to the answer above

Edited February 23, 2015 by landeTLS

[NecroBones]

If you're trying to merge a circle of vertices, to another circle of a different diameter (but the same number of vertices), you can do it by turning on "auto-merge" and also snap to vertex. Then you can scale one of those circles of vertices, snap it to the other, and they'll merge automatically.

[sumghai]

If you're trying to merge a circle of vertices, to another circle of a different diameter (but the same number of vertices), you can do it by turning on "auto-merge" and also snap to vertex. Then you can scale one of those circles of vertices, snap it to the other, and they'll merge automatically.

Use this feature with care, however - if you have very complex geometry, sometimes unwanted vertices may also get merged as well.

[michaelhester07]

When you use the boolean operation in blender make sure you have the normals on the subtraction object setup right (facing outward). This is one of the better ways to make windows on ships as well as the thruster ports.