Hi Sanjeev,
In my modest experience, there’s no harm in setting it up as high as you can. The only drawback is the time it takes to compute the analysis.
What I typically do is I try to start with low sampling, and increase it until I see it makes insignificant difference in the results. The issue is if you only change the Pupil Sampling and keep the default settings, the Image size changes, which makes it hard to compare. So, I usually set a fixed Image Sampling and Image Delta, so the Image size remains constant while I go over the different Pupil Sampling options.
Hope this helps.
Take care,
David
@David.Nguyen is spot-on. Aim for the point where if you double or halve the sampling it makes no significant difference. ‘Significant’ is of course subjective.
Thanks David.Nguyen and Mark.Nicholson for your reply.