2D (two dimensional ) definition Fine Arts & Visual Arts / Art Terms) (of painting or drawing) lacking the characteristics of form or depth
So flat mediums. paint, glitter , marbling , stickers
3D is raised , 2. (Miscellaneous Technologies / Photography) (of a film, transparency, etc.) simulating the effect of depth by presenting slightly different views of a scene to each eye 3. (Mathematics) having volume 4. lifelike or real
so Acrylic sculpted flowers etc , attached gems , bullion , that sort of thing.