Last night I ran a standard 1500 patch run for MadVR. I used a white point of 'as measured' so the 3dlut corrects the white point. It looks good, apart from the AVSHD white clipping pattern - the bars flash green all the way to 254. Without the 3dlut, the bars are clipped at 235 as expected with an all PC levels chain (and the bars under 235 flash neutral grey). Does anyone know what could cause this, and if it's a problem? A 100% white test pattern displays as white the 3dlut enabled, and running 'report on calibrated display' from Displaycal reports that the white point is 6570k.