Confused about Anisotropic Filtering

[bslenul]

Hey!

Could be a dumb question, but does anyone can see any difference with the anisotropic filtering set to "Off" and "16x"? Because I can't :x

Here it's set to "Off": https://i.imgur.com/VgS9GhJ.png
Here to "16x": https://i.imgur.com/gfIqU8l.png
(PPSSPP restarted between each screenshot, to make sure the change was applied)

I can't spot any difference, shouldn't it look like this when AF is OFF (quick mockup, just to give a rough idea)?: https://i.imgur.com/dgbKATc.png

Note that I'm asking more for curiosity than anything else, I'd probably stick with 16x anyway, but I just don't understand :/
I thought maybe it was my settings from the Nvidia Control Panel forcing it or something, but AF was set to "Application-controlled", I even tried forcing it to "Off" globally but no matter what it doesn't seem to change anything...

In this post it's clearly working: https://forums.ppsspp.org/showthread.php...#pid123817 but it's from 2016.

So anyway, does it work for some of you? If so, any idea what I am missing? This is on PC btw,Windows 10 / i5-4670K / GTX 970, same results with the RetroArch core.