Greg, Jack, The radiance list *rocks*! Many thanks guys, really cool. -jelle On Dec 15, 2010, at 9:00 PM, radiance-general-request at radiance-online.org wrote: > ximage -ov ata/Desk.hdr | rcalc -f xyz_rgb.cal -e '$1=179*X($1,$2,$3);$2=179*Y($1,$2,$3);$3=179*Z($1,$2,$3)'