ACI XCIX-0001

apparently it works the same either on krita or on davinci resolve : blue clips before the 2 other primaries. but still interested if you have an explanation about that ! edit : resolve does not clip the colors with the value slider in fusion but if you take a screenshot and analyse this hdr .jxr in affinity with the color picker, you will notice that resolve actually uses some strange negative values for the primaries to avoid clips them. you can reproduce the same high value color but as soon as you replace the negative primaries values, the blue turns purple.

thank ! waiting for your feedback !

a ! ok thank for your detailled explanation ! the strange thing is that the red, yellow, green, cyan hold up until 60 after that they clipped to another color but the blu only clips after 2. the display use here and configure on affinity is a ks9500 1400 nits 20% windows peak brightness|luminance in hdr mode on windows, full, rgb, 12 bpc, 2160p. the color range used on affinity is rec. 2100 st. 2084 pq. do you know if there is a relation in all of that explaining this difference of threshold before clipping ? meaning why does the blue clipped way faster than the other colors ? could it also be related to the rec. 2100 color space because blue reaches the end of the triangle sooner in terms of wavelenght ?

strange how all the primaries supports 60 value but the pure blue can only go to 2 before it clips to purple with more than that. do you know why ?

thank for answering ! solved by using the 32 bits rgb values and intensity in the color selector. by the way the software is completely wild, the only one to directly open .jxr hdr screenshot to allo to directly edit it on hdr display int the viewer !

can someone explain why on this image when you take it in affinity photo or krita and you take one of the highest luminance bright with the color picker, you replicate the color with 2 brush lines, and the lines are not white but they are black, like to show that the color are out range or something ? is it related to the negative values management you talked about earlier ? do you know how to recreate these colors at these luminances in affinity, krita or, any other software ?