| Value | Meaning |
|---|---|
| textureChannelRed0 | Used to read from the red channel of a texture. |
| textureChannelGreen1 | Used to read from the green channel of a texture. |
| textureChannelBlue2 | Used to read from the blue channel of a texture. |
| textureChannelAlpha3 | Used to read from the alpha channel of a texture. |
| textureChannelGrayscale4 | Currently unused. |
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