Ah, ok, thanks for info. Unfortunately I do face. E.g. invalid displayed Hue/Saturation layer such as modifications shown in blocks and partially totally missing on the image. Example: colorising on a LAB mode image, this is snapped Ps 2019 already set to Legacy Compositing and Mac rebooted, so, as you mentioned, it should no longer utilise Graphics Card (if I understood correct): Umm..., I always thought, Graphics Cards enhance graphics on a computer (on FCPX and DaVinci Resolve they do). Any specific know issues with an AMD Radeon R9 M395X 4096 MB? Of an iMac (Retina 5K, 27-inch, Late 2015), 4 GHz Intel Core i7, 16 GB 1867 MHz DDR3: gener7 wrote I agree, not much information here. Supposedly the new compositing engine uses the GPU and is much faster, but can be buggy with some cards. The legacy compositing engine uses the CPU and is less of a problem, usually with the blending modes. If you do not notice any problems with the new compositing engine, then no need to check legacy. Photoshop CC 2019: 6 blend modes not working in Windows 10 (Darker Color, Lighter Color, Hue, Saturation, Color, Luminos…
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