I just tried it. GPU acceleration is something I've been looking forward to for years. AND......it doesn't work on my pc. Even though my Radeon Fury X is OpenCL 1.2 compliant and I use OpenCL 1.2 renderers with my GPU. For whatever reason painter doesn't work with it, but even painter says it has OpenCL 1.2 but the option is greyed out. Nice job Corel. What a buzz kill.
considering they quietly shipped painter 2019 with no multi-core CPU support, this sounds 20/20 on brand for painter.
-It must be a bug, my was grayscaled too, until my third optimization on welcome screen finally made it work.
Where was the option greyed out? In Preferences?