There looks to be a discrepancy with blender 5.1 for extrude.

[Josh Chernoff]

At 10:40 when making the extrude I get a different result than the training. 

You can see at the corners when pulling in I don’t get the clipping I would expect but instead there are these triangles created. Also if I hold alt while dragging in the extrude I don’t have some of the same alignment issues you later address. 

I assume my best option is to try to merge these verts by hand? 

[Martin Bergwerf]

Hi Josh @FullStacking ,

That has nothing to do with a difference between 4.2 and 5.1, but with you having made a (or more) mistake(s) along the way.

Now I don’t know exacvtly what you did, but if you, go back to just before the Extrude and then Select everything (with A) and M > Merge > By Distance. 

Then it should work fine.

If you can’t go back, you’ll just have to fix them by hand, like you say.

[Dwayne Savage]

My first guess is that you are in edge select mode instead of face select. Also possibly double vertices?

[Josh Chernoff]

I tried to reproduce and indeed it must have been something I did along the way, not seeing the same effect the second time around. 

[Martin Bergwerf]

It’s hard to reproduce, but it might be an unintentional ALT+V (Rip and Fill) on the corner Edges, before Extruding. 

[Josh Chernoff]

TIL: There is a visual undo history in the edit menu. This is going in my quick favs. 

[Martin Bergwerf]

Oh cool! I didn’t know that.

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