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U x V, LOD = 0

U/2 x V/2,

LOD = 1

U/4 x V/4,

LOD = 2

U/8 x V/8,

LOD = 3

Width (u), Height (v) must be powers of 2. From first texture map (2M x 2N), OpenGL constructs other succeeding texture maps until a texture map is reached in which one dimension equals 20 (1)

Example 32 x 16, 16 x 8, 8 x 4, 4 x 2, 2 x 1

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