The inital-scale ranges from 0 to 10 and supports fractional values. You can also pass in explicit width and height values (showin in Listing 10) that can range up to 10,000 pixels
inital-scale 的范围为 0 到 10，且支持分数值。
Width and Height in pixels across each individual Cubemap face. Textures will be internally scaled to fit this size, there is no need to manually scale the assets.
立方图每个面的宽度和高度，以像素为单位。纹理将在内部缩放，以适应这个尺寸，不需要手动缩放资源。
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