Unable to write PSD with alpha channel

I’m using Magick.NET 7.4.3 to convert a TGA image with alpha into a PSD with the same alpha channel but the resulting image always has the alpha blended and the actual alpha channel lost. I’ve even tried using a source PSD with alpha and writing it back out as PSD and the same issue occurs. Here are few issues I’ve noticed:

• Setting AlphaUnblended has no impact on the resulting image whether it’s set true or false in the MagickReadSettings.
• Regardless of write setting saved PSD image never has alpha channel.
• Using MagickImageCollection when reading source PSD keeps the color channels intact but still looses alpha channel
• Using MagickImage when reading source PSD always blends in the alpha into color and still looses alpha channel itself. Here is a sample code:

MagickReadSettings readSettings = new MagickReadSettings()
{
    Defines = new PsdReadDefines()
    {
        AlphaUnblend = false
    }
};
using (MagickImageCollection image = new MagickImageCollection())
{
    image.Read(inPsdFilePath, readSettings);
    image.Write(outPsdFilePath); // results in PSD with good color channels but no alpha channel
}
using (MagickImage image = new MagickImage())
{
    image.Read(inPsdFilePath, readSettings);
    image.Write(outPsdFilePath); // results in PSD with blended alpha and no alpha channel
}

(source psd is a simple single layer red flood with single alpha channel)

[dlemstra]

I still don’t understand what is wrong. I stepped through the decoder with a debugger and the output image WithAlpha_converted has a separate alpha channel. The alpha channel is not blended in the other channels. I have no other way that to use Magick.NET/ImageMagick to inspect your output images so I don’t understand why you came to this conclusion.

[dlemstra]

@FuzzyTrace It is still a bit unclear to mean what the bug is that you are trying to report. Can you reproduce your issue with the latest release and can you try to explain again what is incorrect?