+- Gimp-Forum.net (https://www.gimp-forum.net)
+-- Forum: GIMP (https://www.gimp-forum.net/Forum-GIMP)
+--- Forum: General questions (https://www.gimp-forum.net/Forum-General-questions)
+--- Thread: 'Transparent' area is brown. (/Thread-Transparent-area-is-brown)
'Transparent' area is brown. - Black Jack Davy - 07-04-2025
I add an alpha channel to my uploaded jpg.
Whichever method I use (lasso tool, eraser) shows the area I wish to remove as the usual two-tone grey squares, but when image is exported as .png these areas are not transparent but a brown-grey fill.
No change in method I've been using before. Is it a 3.04 thing?
Thanks in advance for any suggestions or assistance.
RE: 'Transparent' area is brown. - Ofnuts - 07-04-2025
(07-04-2025, 12:20 PM)Black Jack Davy Wrote: I add an alpha channel to my uploaded jpg.
Whichever method I use (lasso tool, eraser) shows the area I wish to remove as the usual two-tone grey squares, but when image is exported as .png these areas are not transparent but a brown-grey fill.
No change in method I've been using before. Is it a 3.04 thing?
Thanks in advance for any suggestions or assistance.
What specific format are you exporting to? If it doesn't end in "A" (like "RGBA")(unless "automatic pixelformat") there won't be an alpha channel.
RE: 'Transparent' area is brown. - Black Jack Davy - 07-05-2025
[attachment=13671 Wrote:Ofnuts pid='44837' dateline='1751643668'][attachment=13671][attachment=13672][attachment=13673]
(07-04-2025, 12:20 PM)Black Jack Davy Wrote: I add an alpha channel to my uploaded jpg.
Whichever method I use (lasso tool, eraser) shows the area I wish to remove as the usual two-tone grey squares, but when image is exported as .png these areas are not transparent but a brown-grey fill.
No change in method I've been using before. Is it a 3.04 thing?
Thanks in advance for any suggestions or assistance.
What specific format are you exporting to? If it doesn't end in "A" (like "RGBA")(unless "automatic pixelformat") there won't be an alpha channel.
Thanks for your reply. Probably best if I show you.
RE: 'Transparent' area is brown. - Ofnuts - 07-05-2025
Hmm Can't reproduce. How are you checking the transparency? How do you know the dark grey is is the image and not the way your image viewer displays transparency? If you import the image in Gimp, it is show as transparent or is the dark grey still around?
RE: 'Transparent' area is brown. - rich2005 - 07-05-2025
Hard to find an image viewer that does not show transparency as a checker but I can use XnViewMP
As examples:
[attachment=13674]
(1) The png exported with Save background colour (BG) checked. BG is the colour swatch setting, usually white but could be any colour. That comes into effect when the image is flattened (alpha channel removed or say export as a jpeg) and any transparency becomes that colour. In a viewer that does not support transparency any alpha might show as white or black (depends on Viewer)
(2) The png is exported with Save color values from transparent pixels checked. The image pixels remain and might show in an image viewer.
Thats the png possibles, depending on viewer.
RE: 'Transparent' area is brown. - sallyanne - 07-06-2025
Irfanview shows checkerboard or a color for transparency. Depending on the settings.