I suppose it's easy to theorise, and propose ideas, but ultimately you never know what works in practice until you experiment. It's good to know you've played around with it!The SSAA is ultimately very simple, it's merely the sample patterns that are stochastic rather than regular. I don't think heterogenous sampling is realistic given how the hardware works. I've played around with time sensitive and incremental approaches but these proved quite impractical.
Sounds great! Can't wait to try it out in the alpha!we were so impressed with the overall visual quality it provided over hardware AA (for some things such as vegetation it is more noticeable) that it became one of our favourite features and we started to design a lot things around it.