Is it normal render like this with cycles? I set the GPU only (AMD RX 570). Because, if I use the CPU the render is very slow, even when I use OPENCL. GPU is faster, but the result is this picture. With Eevee or Cycles by CPU, everything runs fine.
Is there something I can do here, to fix this, or I just set cpu+opencl?
That sounds like a bug! I would recommend reporting it here: https://developer.blender.org/
I found the same issue on developer.blender.org. I update the drivers to Adrenalin 21.2.2 and I got a clean render. But, I am unable to work in the viewport shader: rendering. Even when I try to use ctrl+B, to select only a fraction of the viewport, Blender crash. I know now, this is a problem with AMD Drivers. Next time, I will buy a Nvidia GPU.
I will keep working with the CPU + OpenCL to work on viewport shader: rendering, and when I am done, I will render with GPU Compute.