Light and shadow - though having the same source and the same origin, they are always in opposition.
光与影——虽然发源相同,起因一致,它们却往往背道而驰。
When an object space normal map tells a face it's supposed to receive light coming from the left of the object it will always do so, even if the face is pointing away from the light source.
当一个物体空间的法线贴图告诉一个面,它被期望接受来自物体左边的光线,它就会这样做,即使这个面实际是指向光源的。
Face the light: Lights can dispel shadows and create soft features on your face, so always try to turn your face toward the main light source.
面朝光线:光线能驱散阴影,让五官显得柔和。所以,自拍时要尽量面朝主要光源。
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