当渲染到纹理时，片段程序必须能够输出需要的数值。

When rendering into the depth texture, fragment program must output the value needed.

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如何把纹理渲染到图像中？

How to get rendered image into a texture?

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当一个纹理渲染以大于原先的尺寸渲染到屏幕上去，我们说它被放大了。

When a texture is rendered to the screen at a larger size than it was created we say is has been magnified.

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最终渲染阶段产生最后渲染后的图像，到这一步，所有的对象都将被再次渲染，其中着色器将混合前一步生成的光源和纹理以及所有自发光照明。

Final pass produces final rendered image. Here all objects are rendered again; with shaders that fetch the lighting, combine it with textures and add any emissive lighting.

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当渲染到深度纹理时，在片段程序中使用它。

Use it in a fragment program when rendering into a depth texture.

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当渲染到深度纹理时，在片段程序中使用它。

Use it in a fragment program when rendering into a depth texture.

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