You are missing a property that is not yet available in Magick.NET. I stepped trough ImageMagick in Visual Studio to figure out what is happening. And it looks like there is a bug in the OpenCL code.
I almost got it working excepted for the '-set colorspace RGB' option. I will get back to you about this later.
I almost got it working excepted for the '-set colorspace RGB' option. I will get back to you about this later.