[your subject] rough hand-drawn black linework, loose sketchy outlines, thick chunky oil paint fills, muddy muted colors, imperfect color mixing, visible oil paint strokes, dry-brush marks, patchy paint coverage, scumbled texture, rough uneven edges, scribbly expressive details, simple shapes, naive hand-painted illustration, isolated on white, minimal composition, raw handmade feel, imperfect and spontaneous, tactile traditional paint texture