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How many mipmap levels are in this texture (Read Only).
The returned value includes the base level as well, so it is always 1 or more.
Mipmap count is used if you use GetPixels or SetPixels to fetch or modify the different mip levels. For example, you could change a texture so that each mip level is tinted in a different color - then in the game you'd see which mip levels are actually visible.
See Also: GetPixels function, SetPixels function.