In virtual environment, the object shadow silhouette is same as the perspective view at the position of light.

在虚拟环境中，对象阴影的轮廓与在光源位置对对象的观察视图相同。

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And if there are multiple light sources, why does each object only cast one shadow?

而且如果说有多个光源的话，为什么每个物体只有一个影子呢？

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The qualities of a shadow depend on the light direction and intensity, as well as the distance between the object and the surface where the shadow is cast.

阴影深度取决于光照方向和强度，以及物体和投影面的距离。

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With red and white light, the shadow of the object appears in the complementary color -- cyan -- and the shadows change as your angle of vision changes.

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Making use of seven shooters simultaneously, the system photographs the object while projecting various light and shadow combinations in order to determine the ware's geometry.

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In contrast, Yang's lensless microscope places the object close enough to the sensor that it casts a shadow.

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