04-16-2024, 12:13 PM
The way I initially read your post was an existing selection and then a colour selection. Depending on the select mode - those 4 little icon toggles replace - add - subtract - intersect - will demolish an existing selection.
You clarified that - only a single colour selection (in replace mode ?) and Gimp locks up. It could be the threshold setting, it might be worth increasing the value (default is 15 try 40 or 50) or it might be Windows 11 ( upgrade from Win 10 ? )
You could report it as an issue, make sure you include a link to a "large grayscale" image that causes the problem. Difficult to comment without knowing what the image is.
You clarified that - only a single colour selection (in replace mode ?) and Gimp locks up. It could be the threshold setting, it might be worth increasing the value (default is 15 try 40 or 50) or it might be Windows 11 ( upgrade from Win 10 ? )
You could report it as an issue, make sure you include a link to a "large grayscale" image that causes the problem. Difficult to comment without knowing what the image is.