顶点光照材质不接收阴影(但能投射阴影)。

Vertex-lit materials won't receive shadows (but do cast shadows).

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最后，在正向渲染路径，只有最亮的平行光可以投射阴影。

Finally, in Forward rendering path, only the brightest directional light can cast shadows.

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物体可以投射阴影到彼此的上面，以及投射到自身上(自身阴影)。

Objects can cast shadows onto each other and onto parts of themselves (" self shadowing ").

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