Hi @Valerio Pilotti, these head studies look great! I think one thing you may be struggling with is the structure of the head as it rotates upwards (I have trouble with this angle too honestly). Just keep in mind that as the head starts to rotate up and down, the features (brow line, nose, and mouth) no longer sit at the 'thirds' of the face. Additionally, the head will start to appear smaller at this angle and will have proportions closer to that of a circle. I also did a minor tweak to adjust the structure of the forehead and brow line and the shape of the jaw. Other than that your studies look awesome! Let me know if there is anything that I can clear up for you

Good. Keep practicing

these look really cool! I like them a lot