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Power-of-two

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Power-of-two is any number that can be expressed as 2 in power of any whole positive number.

2^1 = 2
2^2 = 4
2^3 = 8

Power-of-two textures are usually something like 128 x 128, 128 x 256, 256 x 256, 512 x 512, 1024 x 1024, 2048 x 2048. Generally it is not advisable to go beyong 1024 x 1024 texture size to support older hardware.

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