hi Kahboom ! thanks for your feedback
you're right that arm is too light eventually. if i work on again, ill improve it
another one 1h or so, I have not had time to finish this time, I think I lost some time on details, some people missing :-(
Wow, you have very good control of your lines/brush strokes. What I can see is that the people in the last image are a bit too small compared to the original and the values are brighter or darker sometimes (like the clothing on the man in the front is darker, the wall is brighter, etc). But for one hour your study is pretty cool regardless!