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[Blender] Subdivide not working + what does NGon mean?

During my last Blender lesson, I came across the term NGon in the comments. In short, this word refers to a face with more than four edges:

The consequence in Blender is that we cannot use the Subdivide tool properly on such faces.

So what’s an ngon anyways?

[Blender] How to change default non-selected edge color

After changing the theme to Flatty Light, I wanted to make the edges of my models more apparent by having more contrast between edges and faces. In User Preferences -> Themes, it was easy to spot the Face setting, but instead of an edge setting, you need to look for the Wire Edit setting:

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[Blender] I keep selecting the same vertex when two or more vertices occupy the same point in space

Just activate wireframe mode by pressing Z:

Now, right clicking the visible vertex will toggle between all of them.

[Blender] UI graphical corruption with AMD/ATI open-source driver

Opening Blender (v2.79) this morning, after not running it for months, I noticed some serious glitches making Blender almost unusable.

I have an old HD7750, using the open-source xf86-video-ati driver. It seems to be a bug within Blender, but fortunately there's a quick fix: change Window Draw Method to Triple Buffer in File -> User Preferences -> System.

The ArchWiki also notes that that setting may increase VRAM usage.

[Git] List the files which have been modified between two commits/tags

I needed to know the exact list of files that had been modified between my last two tags:

git diff --name-only v2.0.0 v2.0.1

You can replace the tags by commits:

git diff --name-only SHA1 SHA2
git diff --name-only HEAD~10 HEAD~5

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