Hint: Avoid dithered grayscale images in Photoshop

Do you know this problem, too?

You are pasting a greyscale image into the alpha channel of an 8-Bit image in Adobe Photoshop and the pasted result is ugly dithered!

There is a solution for this issue!

Go into Photoshops Color Setting and disable the „Use Dither (8-bit/channel images). And voilá: Your result is clean and as prepared.