Form
Forms are three-dimensional objects that have height, width, and depth. Unlike shapes, forms take up space and have volume.
Common forms include spheres, cubes, cylinders, cones, and pyramids. Think of a shape as a flat circle and a form as a ball you can hold in your hand.
Forms can be actual (physical, like a sculpture) or implied (created through shading and perspective techniques in a 2D artwork). When you draw a cube on paper and add shading to make it look 3D, you're creating the illusion of form.
Understanding forms is crucial for creating realistic art that appears to have depth and dimension.