first two numbers are top left corner, last two numbers are bottom right corner.
each dimension must be a power of 2. (2, 4, 8, 16, 32, 64, 128, etc.) A 64 x 256 DDS will work fine.
512x512 or 1024x1024 are most common. Save ad DX1 for lowest filesize.
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Park Royal 1 Prathumnak Pattaya