Anti-Aliasing Methods

[Ron5s]

I have been using the following line of code to use anti-aliasing in my program:

System.start({title: "test", width: WIDTH, height: HEIGHT, framebuffer:{samplesPerPixel: 4}}, function (_)

Lately this has not been working. Since this is not the preferred method of AA what other ways can I achieve the results as shown in the attached pictures.

Ive attached two images showing AA working and and not working.

Thank you for the help.