Fair point, you’re right it could/should mention box filters somewhere. It has the let’s average samples over a pixel part, and it has decent citations (I notic

Fair point, you’re right it could/should mention box filters somewhere. It has the let’s average samples over a pixel part, and it has decent citations (I noticed Alvy Ray Smith’s “A Pixel is Not a Little Square”). Connecting the averaging to basic terminology is a completely reasonable thing to do. Apologies I didn’t mean to suggest filtering is your pet topic, filtering is very important (and fun & fascinating), mandatory for a graphics education, I only wanted to point out there are other equally deserving topics for an intro book/course. I was lucky enough to take graphics from Peter Shirley, and the first two topics he covered were filtering and colors, in depth. I’d never truly understood the shortcomings of box filtering until he had us rendering a 2d sinc function and try to get rid of any hint of aliasing with a million samples per pixel. That assignment made it really tangible and visceral, gave real practical intuition for filtering that stuck with me. Definitely start playing with denoisers. There’s a lot to do and it needs people who care about filtering to scrutinize it.