what you may be seeing is the alpha from the edges of shapes in the fbo that gets rendered again when you draw the fbo (ie, the alpha from the edge of the mesh adjust the alpha of the fbo pixel and when you draw the fbo that pixel is not 100% opaque)
there’s an option in the nvidia properties in windows to choose the nvidia card to run an specific application can you try to find the example you are trying to run there and set it to run with nvidia rather than intel?
Thanks for your advice. I just tried this out
with updated intel drivers and intel card selected for the app: still aliased
with nvidia card selected for the app: antialiasing
I’m hoping to make this app publicly available - so I’m wondering if the line smoothing behaviour is consistent across most graphics cards (e.g. the NVIDIA result is what I should expect people to see and the intel 4600 is an oddity), or is there something I need to do if I want the software to present consistently?
thanks Arturo - that’s really helpful and good to know. I just tested it on another machine and it looks fine - so I guess I got unlucky with my main machine’s config. I’ll check out the intel control panel.