It's good to see you are still working hard on these Henrique. One thing I want to say about your values is that you are making some of the shadows too dark. The reason is because you are not thinking about all the light that would be bouncing around the environment of your still life. Remember this statement: "All surfaces that receive light, become a light source" What that means is that even if you have a single light source lighting your objects, the light reflecting off of the other elements in your image will also become a light source because of all the light bouncing off of them. The only time this doesn't apply is when you have ambient occlusion because no light, even bounce light, can not get there. I did a quick diagram to show you what I mean, I hope it helps :)