Andrzej Duda wrote: > so I've made another one using the same .ti3 file and -ax. This time > no warning messages and much better > numbers : > profile check complete, peak err = 0.377113, avg err = 0.024427, RMS > = 0.043701 > compared with the -al version: > profile check complete, peak err = 2.473854, avg err = 0.363055, RMS > = 0.458722 > > But the new profile gives more banding in dark grays and rather > strange 3D in 'gamt' tag. > ? I confirm that generally XYZ-LUT profiles are tend to significant banding in real use. The banding is preventing the use of -ax key for display or camera profiling. The quality of such profiles is unacceptable (ArgyllCMS V1.0.4. I've didn't try -ax with latest versions). IMHO, much more smoothing is needed for XYZ data in the darks, may be in overall.