Do you mean when the brown moved to the more bluish? It's autocontrast and autocolor (but they're really extreme, so it's best if you do it at the end with a new layer so you can control the extremes) C: After that, there's selective blurring and such.
Yes, i was talking about this effect! Thank you so much, i was searching for it for ages Q 7 Q
Also, i'm sorry if i'm asking too much questions- what kind of brushes do you use, and what are you setting please? I'm a total noob with photoshop, especially brushes, so i don't know if i have to download new ones or if i should use the default ones
No worries, I'm happy to answer questions C: I use basic Photoshop brushset for almost everything - usually the round. My settings vary a lot on opacity, size pressure and hardness. I recommend getting a grasp of the basic set first, then expand to additional brushes. It's fun to collect brushsets by other artists, but in the end they just lag PS if you load too many and many are only useful for very very specific occasions and often depends on painting style.