Random vertices outside the selection area are selected when I use the circle select tool. This only happens when display mode isn’t wireframe and selection is limited to visible. Box select is also affected.
The strange behavour began seemingly out of the blue, but after I toggled experimental feature set on and off and after I unintentionally pressed a couple of buttons in rapid succession, so I might have unknowingly triggered some option.
I tried first adding a sphere and Susanne in a new project and then importing the mesh into it. In all cases the issue persisted. The issue was present with all meshes in the other file, too. It seems it stems from Blender itself and its settings instead of a particular mesh.
I reextracted blender from the zip and the issue persist in the default scene with just a torus added in. It’s even present in a 2.8 build I downloaded some time ago. All of that after resetting to the factory default twice.And yet the issue appeared just yesterday. It’s as if it’s some setting stored somewhere on the computer - is that a thing?
Yup, it’s that. And since it appeared mid-session, it seems it’s a driver setting issue rather a driver one. I just hope someone on the internet will have figured it out.
Edit: Changing some Blender settings fixed the issue. I think it was ‘Anisotropic filtering’ to 2x and ‘Window draw method’ to ‘Automatic’, ‘Multisample: 8’, both in system section.