I did this study to practice how to paint trees. It is really difficult to paint darks on the top of lighter color background. I tried doing darks first then use lighter colors to cut off the branches, but I can't get fine twigs that way. I have to finish this painting in two sessions. I have to wait the lighter background dry enough so I can paint darks on top. Do you have a good way to do this kind of thing in one session? Please please let me know.