The drawing and sky stage is completed. I shall start to add some of the darker twigs next. They will not be black as I never use black paint ( black is the absence of light which only happens naturally, I believe,  in the environment in which our planet resides - space). Instead, I shall make them a darker shade of the purplish/maroon colour that the actual twigs are. Some areas of the twigs will 'catch the light' and reveal a lighter shade with some tinges of green.