能够在游戏里放置物品同样也使他们可以在成果中直接预览到他们想要放置的模型，使他们能为了达到最好的视觉效果调整材质和贴图。

Being able to place items into the game also allows them to directly view their models as they will appear in the product, enabling them to adjust materials and textures for the best visual result.

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这个新的贴图坐标被用来索引一般的材质贴图和其他用在表面上的贴图。

The new texture coordinate is used to index a regular texture map and any other maps applied to the surface.

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原始的材质贴图坐标和高度数据已经在切线空间中了，因此视向量最好也能如此。

The original texture coordinate and height values are already represented in tangent space, so the eye vector must be as well.

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