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colortestthing. Irfanview dithering test File Comparison of PPM and animated dithered by Irfanview Comet Tuttle en Comet Tuttle en Cczero Original upload log en FSII CommonsHelper page en colortestthing Comet Tuttle bytes no Irfanview dithering test File Comparison of PPM and animated dithered by Irfanview cczero