By popular demand, the Cylinder light, a true area light source is now included.

增加了圆柱体光和真实面光源以满足大众的需要。

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This is to roughly show the area affected by the light source.

这是为了大概表明下由光源影响的区域。

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This is to roughly show the area affected by the light source.

这是为了大概表明下由光源影响的区域。

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