This was exactracted from a 8192x4 texture, with 32x4 tiles. 4 patterns appears, each 8x128 bytes long.
these patterns are repeated, and one is always left out. So 123, 234, 134, 124. The repetetive cycle is therefore 4x3x8x128 = 12288 bytes long. I've included the color code ods file, which contains the normal -> actual position. I have no idea how this goes for larger tiles (is the process applied to the large tiles or always to the small ones?). Maarten.
layout.ods
Description: application/vnd.oasis.opendocument.spreadsheet
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