Hi, thinking about it, I don't think it can be fixed. Quick Mask is just a UI shortcut for using a channel. And a grayscale image can only have grayscale channels. So if you filed a bug report for this, we would probably have to close it as WONTFIX. Sven _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer