Alex Jamison wrote: > H'mm. I tried the first step: txt2ti3 ColorCheckerSG.txt ColorCheckerSG That assumes you measured your chart. Is that what you did, or did you download the reference from X-Rite ? If the latter, then you need to edit it to add the header and footer rather than using txt2ti3 & spec2cie, as per the instructions. Graeme Gill.