>Thanks I use Windows 7 64 bit. >I have seen reference to alpha channel but don't know that they are. >Could you explain what an alpha channel is and is there a method of >adding a layer which is not an alpha channel? > >Maybe I can EXPORT to another format then import into Paint Shop Pro >convert and save?
An alpha channel is just a mask which tells the particular graphics application used that any pixel is 'transparent' often represented by that checker board pattern. Not all applications respect an alpha channel. just do a search https://en.wikipedia.org/wiki/Alpha_compositing You can try a png with mode set a indexed 1 bit. the properties look like the attached. However, are you sure you are on the correct track, what does flight simulator require. A layer mask in Gimp is B&W where black is 100% 'transparent' and white is 100% 'opaque'. That provides the 'alpha channel' (and ignore that Imagemagick command line, same as a Gimp grayscale with alpha. My bad info) rich: www.gimp-forum.net Attachments: * http://www.gimpusers.com/system/attachments/693/original/indexed.png -- 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