When an object is sitting on another surface, less reflected light can bounce into the deep crevice between the object and the what the object is sitting on. The darkest part of a Cast Shadow is closest to the object. Occlusion Shadow – Part of the Cast Shadow. The difference between shadow and cast shadow is : shadow is on the object, cast shadow is caused by the object blocking the light from getting onto another surface. In sunlight, it is your shadow on the sidewalk. The primary light source is blocked from illuminating the second surface by an object. The darkest parts of the surface are those which send to the eye NONE of the direct rays and the fewest rays of light which strike the surface after being reflected from some other surface.Ĭast shadow – The dark area cast onto another surface by an object blocking the light source. ![]() Shadow or Form Shadow – those parts on the form which face away from the light source and receive no direct rays from the light source. This is just as important as having the correct perspective of all the objects. In a drawing, all of the shadows of all the objects must relate to the intensity, angle, and position of the light source(s). Every object appears lighter on one side, darker on the opposite side, and throws a shadow upon some other object. To understand how to shade properly we need to understand how light interacts with an object.Īny object has a light side and a shadow side, and there is light and shade upon even the blackest object. How the light interacts with the surface planes is shown by shading. ![]() To show form, we need to show the light on the form.
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