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upright= multiplier from 1.70 to 1.75 results in significant and mutually distinct rendering anomalies, possibly due to rounding errors resulting from use of integer font sizes.[original research?]Font rasterization is the process of converting text from a vector description (as found in scalable fonts such as TrueType fonts) to a raster or bitmap description. This often involves some anti-aliasing on screen text to make it smoother and easier to read. It may also involve hinting—information embedded in the font data that optimizes rendering details for particular character sizes.