Why might the professors have chosen a non-grid sampling in this slide?
@mchoquet To emphasize that we are sampling points, not pixels.
True, good point. I also remember Kayvon saying in class that real renderers benefit from non-grid sampling; any idea why that might be?
To learn more:
Stochastic Sampling in Computer Graphics
Techniques for choosing good random sample positions http://www.cs.utah.edu/~shirley/papers/thesis/ch5b.pdf