a quick sketch of a tree structure

natureinspired representation illustrations environmental environment preliminary expressive minimalist unfinished conceptual silhouette impression ecoconcept structure essential requiring depiction handdrawn unrefined landscape ecodesign captures detailed gestural artistic projects abstract outdoors branches freehand creative stylized artistas elements shading concept designs natural drawing outdoor outline organic foliage strokes sketchy gesture process dynamic minimal sketch convey simple nature design pencil branch forest visual earthy quick loose shape lines trees style ideal