I'm using a Nvidia GeForce 720 display adapter that supports OpenCl but I can't get Painter 2020 to use it. It appears the accelerator application recognizes it. How do I get painter to use it?
The Painter Brush Accelerator test compares the performance of your GPU to your CPU and determines what are the optimal settings for your system.
The most important thing when running this test is to ensure you do not have extra documents or applications open, as they can affect the test results. (so if you did have extra docs and apps running, consider closing those and re-running again)
After the test is run, the optimal settings are chosen: In some cases, the GPU is very strong and will create a noticeable improvement in brush performance--the cylinder will turn green. In other cases, your CPU may be very strong...so strong in fact, that it is the better device to use for all painting activities. In these scenarios you will see a greyed out cylinder because the GPU will not be used.
I suspect in your case, you CPU is stronger than your video card for brushing duties.
On my personal Painter systems:
System A: Has a GeForce 1050ti with a 2nd Gen Intel i5 processor. Cylinder is green, GPU is used.
System B: Has a Radeon R9M370x with a newer AVX2-compatible 2.5gz i7 processor. Cylinder is greyed out, GPU is not used.
For the record, both systems paint quite fast with Painter 2020, and paint faster than Painter 2019.
I hope this helps clarify...
In my case the GPU tower shows that it supports OpenCL 1.2 but noted it was not in use but is recommended as indicated in the picture I posted above.
Yes I think that is expected...I'll clarify as per my systems:
System A: Has a GeForce 1050ti with a 2nd Gen Intel i5 processor. Cylinder is green, Open CL 1.2: Yes - In use
System B: Has a Radeon R9M370x with a newer AVX2-compatible 2.5gz i7 processor. Cylinder is greyed out, Open CL 1.2: Yes - Not In use
Again, to my knowledge, the "not in use" and grey cylinder is shown when Painter has determined that your CPU will provide the best performance for your brushing experience.
That would be impossible. GPU accelearation is leagues faster than CPU accelearation in this case. I have the same problem on my Fury X. Programs that use open CL acceleration such as the blender renderer or lux renderer is much faster when using the gpu over the cpu.
After testing, it seems that Painter has a problem initially enabling some cards for the benchmark. But as long as you have a open cl 1.2 card you can manually enable it in performance and the gpu accelerated brushes will work.
When looking into enabling the GPU in Preferences-Performance, the Graphics Processor option is greyed out on my system. This is with 2 Radeon RX 580's installed.
As mentioned by Stephen above, " Cylinder is greyed out, Open CL 1.2: Yes - Not In use".
Hope Corel can sort all this out, since I agree that using the GPU will accelerate significantly more than typical CPU's. My workstation has 2 Xeon 10 cpu chips for a total of 40 threads. The Painter Benchmark score is 2204, which only falls into the "good" category for acceleration.
I can't imagine what the score would be if Painter was able to access the GPU's.