Which term describes the shadow an object throws onto surrounding surfaces — distinct from the shadow on the object itself?
AForm shadow
BCore shadow
CReflected light
DCast shadow
A cast shadow is the shadow projected by an object onto another surface (the table beneath a sphere, the floor beside a cylinder). It is distinct from the form shadow, which is the shadow on the object itself. Cast shadows typically have harder edges near the object and softer edges further away, and their shape is determined by the light source direction and the geometry of the receiving surface.
Question 2 True / False
Shadows in a well-observed drawing should typically be rendered as flat, dark gray areas with no variation in value.
TTrue
FFalse
Answer: False
This is one of the most common errors in beginner drawings. Shadows contain reflected light — secondary illumination bouncing from surrounding surfaces back into the shadow zone. This means the shadow is not uniformly dark: the core shadow (the area least reached by any light) is darkest, but reflected light lifts the values in the rest of the shadow area. Additionally, shadows often contain color from the surrounding environment.
Question 3 Short Answer
What is the difference between a form shadow and a cast shadow, and why does the distinction matter for drawing?
Think about your answer, then reveal below.
Model answer: A form shadow is on the object itself — the area turned away from the light source. A cast shadow is projected onto an external surface. The distinction matters because they have different visual properties: form shadows are gradual and follow the object's surface; cast shadows have more definite edges and shapes determined by the geometry of light, object, and receiving surface.
Confusing the two leads to drawings where all shadow areas look the same — flat and undifferentiated. Form shadows model the three-dimensional volume of the object; cast shadows anchor objects to their environment and communicate light direction. Treating them with different edge qualities and value gradations is what makes a drawing read as spatially convincing.