Thanks a lot for the datailed feedback. Most of the time details doesn't work on my side, so I was trying to keep peaces simple as more as possible for graphic look. I never learned how to use details properly I guess. And unfortunately I didn't use any reference,otwerwise it would look more natural.I will think about contrasts more next time. 3d background would be better I think,drawing by hand takes to mcuh time so I decided to use picture to focus more on characters. I will make a note.Thanks again,I appreciate that.