Indirect Light – Secondary light that illuminates the shadow side of the form. This light is also referred to as “bounce light” or “ambient light”.Īmbient Occlusion – The absolute darkest part of the shadow, usually recessed, is called the ambient occlusion. Reflective Light – Unless we are talking celestial bodies, all shadows have some light within them due to other objects nearby also lit by the same light source bouncing light into the shadows. (Bed bug line comes from an old saying by art teacher Philip Leslie Hale warning his students to “Beware the bed bug line!” in reference to the line which defines the division between the world of light and the world of shade.) The terminator line does not receive this reflected light and as a result appears to be the darkest part of the shadow space. The softer the light gets, the more gradated the terminator becomes.Ĭore Shadow – another name for the terminator used when the shadow side of the terminator is illuminated with reflective light. If the light is strong the terminator will end more abruptly. Terminator – also known as the bed bug line, or the edge along the form where the light and shadow meet each other. ![]() It mixes with the local color sometimes making it hard to see the blue influence.įorm Shadow – The opposing side of an object unable to receive light rays from the “direct” source of illumination. Outdoors this is the blue sky is the color of the cast shadow. Indirect Light – Secondary light that illuminates the cast shadow. Penumbra – the gradated space between where the light and shadow meet each other in spaceĪntumbra – the end of the cast shadow, or the “front” “before” the shadow as the word suggests.Īmbient Occlusion – The absolute darkest part of the shadow, usually recessed, is called the ambient occlusion. Umbra – core or center of the shadow, the darkest portion of it. Drop shadow comes from graphic design and is a floating shadow below a logo, frame, etc. DROP SHADOW is not the same as cast shadow even though you might see reference out there in the world with the cast mislabeled. Multiple projections will be cast if there is more than one light, and the projections will appear out of focus if the light is larger than the object receiving the light. Here are a list of terms related to shadows, both cast and form, that you might want to copy paste into a document of your own for future reference.Ĭast Shadow – The Silhouetted Projection of an object illuminated by a source of light. Shadow – a dark area or shape produced by a body coming between rays of light and a surface. This is the definition of shadow without preceding it with the words cast or form: ![]() Therefore our language begins with form shadows as opposed to cast shadows. The terms cast and form are not included in this dialog.Īs an artist our focus is more upon the projector and less so on the projections. The arts and astronomy focus on a more specific language regarding shadows while in the public, Youtube videos, educational books, and several articles I looked up on shadows focused primarily on the cast shadow, barely referencing the object projecting the shadow or that the object projecting the shadow also has a shadow side to it. ![]() Here is a technical breakdown of what a shadow is, how to make them, and why they are important. This is in response to these questions in hopes that this will clear things up when I talk about shadows, indirect light, and when I use the word Notan and why. I have also had several semesters worth of students who also have no idea how to see a shadow on the figures they are working from. I have had several questions asking about what a shadow is and how to recognize them. ![]() As part of this color series I am doing, I’m realizing that there are some things even more fundamental that need to be explained so that everything else I am teaching here makes better sense.
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