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NOTE: as per Moonboots helpful suggestions. Here is the .Blend file for this problem:

Hello all I am trying to learn Blender. I've read lots and watched lots of videos and kinda understand the need for Quad Junctions to 'steer' the edge loops to make sharp edges in the model etc.

I'm currently trying to make a fairly basic car bonnet/hood. It is almost all flat, except there is a vent in the middle with a rim running around it like so:enter image description here

So I traced the shape of the bonnet with vertices, keeping it lightweight and simple. I then 'Inset' the inner vent area (without boundaries) and it all seemed to be working fine.

But from the tutorials I watched/read, I gather that I will need a supporting edge-loop around either side (so inner and outer of the actual extruded rim). As stated above the inner one 'Inset' worked great but for the outer one I couldn't use Inset, and so I followed some instruction video and used 'Knife Tool'. But now as you'll see in pic below, the edge-loop doesn't continue all the way around the edge I want it to. It in-fact only goes around the one corner (pic:) enter image description here

NOTE: Here is the correct one on the inside of the area... (NB. I'm new so not certain that even that is the correct way to make such edges in my models).. enter image description here

ADDITIONAL: In trying to debug this, I notice the adjacent faces which I also cut with knife-tool are just registered as single faces still, this obviously what is causing my problem. (another pic...) enter image description here

ADDITIONAL 2: I know see i could delete those faces and make two new ones in the place of the old ones. This has fixed the problem almost (ie. the outer side, of that outer-rim is now a complete separate edge loop). BUT - I still have issue where the loop carries through my junction on the X-Axis (note I have this problem on the inner edge and outer edge of the vent feature).... final pic attached here: enter image description here

Any help hugely appreciated. Many thanks

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  • $\begingroup$ maybe you have double vertices or inner faces you need to remove (double vertices: select all and W > Remove Doubles, inner faces: make your object transparent with Z, select the face and X > Face) $\endgroup$
    – moonboots
    Oct 23, 2018 at 13:42
  • $\begingroup$ hi moonboots, thanks for the reply. Unfortunatly when I done 'Select All > Remove Doubles' I get alert saying "Removed 0 vertices". Just in case you didnt notice in my question, the one not working I cut with knife tool, the working one was by 'Inset' $\endgroup$
    – Big T Larrity
    Oct 23, 2018 at 13:46
  • $\begingroup$ ADDITIONAL: I notice in Face Select mode the faces adjacent (left and above - which I also cut with knife) are showing as one face still!! Im posting new screenshot now $\endgroup$
    – Big T Larrity
    Oct 23, 2018 at 13:52
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    $\begingroup$ perhaps share your file, it will be easier ;) blend-exchange.giantcowfilms.com $\endgroup$
    – moonboots
    Oct 23, 2018 at 14:01
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    $\begingroup$ now I don't see anymore problem, you can create edge loops with ctrl R or with the knife, and the edge you've created on the X axis is perfectly normal, if you don't like the oblique and you want to make it straight you need to correct it manually with G G for example $\endgroup$
    – moonboots
    Oct 23, 2018 at 14:11

1 Answer 1

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In case anyone reads this in future with a similar confusion. The answer was that I had used 'F' to fill between the two vertices next to my knife cuts. But I didnt realise this didn't turn the one face into two. All I had to do was then delete them faces and make two there using the new edges. (hope that helps)

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