But.. I think.. OP is talking about line width in viewport..
Object Properties is used by render engine. Not by OpenGL
There is option for it in OpenGL API. I was using it in EasySpline. But program/plugin has to expose it to the end user..Is a change to the particle / line thickness setting here not reflected visually in the viewport?
There is theoretically possible to make hack/patch for application.. one developer would have to use debugger and find glLineWidth which Modeler uses during viewport drawing and use 2.0, 3.0 or other value instead of default value..Everyone-thanks for your input - yes, the very fine lines are an issue in modeler, and the one thickness in 'object properties' only works for rendering in Layout.
I don't know if I can, or how I would go about forcing AA in a NVIDIA driver on the Mac - but I would imagine it would affect all line not just the ones I am having an issue with