What I was referring is SDFs/MSDFs as in https://github.com/Chlumsky/msdfgen https://github.com/Chlumsky/msdfgen . Of course you can implement smooth circles d

What I was referring is SDFs/MSDFs as in https://github.com/Chlumsky/msdfgen https://github.com/Chlumsky/msdfgen . Of course you can implement smooth circles directly in a shader the way you describe, but note that there are Vector outline shapes that are not circles... Check out the outlines you can do using SVG - paths composed of straight line segments as well as cubic bezier curves and various arcs. Also color gradients, stroking...