>Sorry I forgot to mention that for this 'water mask' I do NOT need >shading. >For the 'blend mask' I do need shading but that is the one I need to >have as a grayscale 8 bit image which I think I am ok with now
oh...I know nothing about flight simulator x requirements I can see what you are trying to do, but... By definition 1 bit is black and white. Add an alpha channel and it is not 1 bit The best I can suggest is not Gimp but command line ImageMagick. depending on your OS (I use linux) a command convert file.tif -channel rgba -alpha on -colorspace gray out.tif might do the job. You can see the file properties from the screenshot. Adding alpha tacks on an 8 bit channel. I suggest asking on the ImageMagick forum, where they are very helpful. https://www.imagemagick.org/discourse-server/ in the User section Give them as much info as possible, add a link to an example image if possible rich: www.gimp-forum.net Attachments: * http://www.gimpusers.com/system/attachments/692/original/im.jpg -- rich404 (via www.gimpusers.com/forums) _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list