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Texture = Moire
RPG-Pro
File :-(, x)
The 'texture' is what we in the printing trade call 'moire'. It happens when the frequency of the scan, and/or the angle of the scan do not match the linescreen (measured as lines per inch, or lpi), resolution of the printing process used in the original image.
To get the best scans, one should scan images at a multiple of the line-screen. Most high-quality printing is done at an lpi of at least 150, although you'll find fine lpi levels of 175-200 in a lot of artbooks. Use a loupe (eyeglass, fabric tester, or if you're pushed, a magnifying glass) to count the number of black dots in a quarter-inch length (straight line, be careful not to be measuring across the diagonal of the linescreen) and then multiply that value by four.
If you get something weird like 168, then it's most likely 175 lpi. if it's 207, then the actual value is most likely 200 lpi.
Take THAT number and find a exact multiple in your scanner softeare and use it to scan the image, making sure that it is PERFECTLY straight on the glass.
If your scanner can't manage it, then scan high, and try using a gaussian blur filter on it. It's often quite successful.
(Image not related, but it illustrates why digitally mastered images are always best, and at least it's pretty big, eh?)
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