.. when making a painting after a study, it costs me a lot of effort to follow this study very well. One is very much inclined to make something different, so-called better, and that's why people usually get confused. A good outdoor-study has a breath of nature in it which must not be neglected or destroyed. You have to get everything out of that study and not just a third or half. If you can really improve one or the other: a la bonheur, but otherwise it is advisable to follow the study obediently as a guide.