Gimp transparency not transparent

Question

I have been using GIMP successfully for a little while, but had no trouble with it. Now my transparent backgrounds are not transparent anymore. I go to Layer and Transparencies then to Add Alpha Channel. Then Duplicate Layer. Then I make the image black and white using Color. I use the Brightness-Contrast control. Then Invert.After this I paint whatever is needed, and I want transparent Black, and what I want opaque I paint White. Then to Edit and Cut, back to Layers and Mask, Add Layer Mask. Then I go back to Edit and Paste. When it is ready I go to file and Export As a png. When I try to use it the background is either black or white. What is my problem? I have already tried several different things to change this such as making sure that the opacity is set right and that the .Save Background Color is not checked.

Answer 1

If no steps are missing from the description, then the active drawable just before the export is the layer mask. In this state, the active layer mask will be exported, which will result in a non-transparent image representing the layer mask.

In order to avoid this, make sure that a layer is active. This is done in the layers dialog by clicking on a layer - and it is noticeable by paying attention to the white outline around either the layer or the mask.

Answer 2

There are several common reasons this may occur:

• Uploaded file gets converted to a non-transparent file type
• You are inserting a smaller version of the file from your image library, which was converted to a non-transparent file type
• CSS on website is over-riding background color for the image

Try this: - Verify file type after uploaded - Try inserting a full version of the picture (if using an image gallery) - Try a different website theme (if uploading to a CMS, like Wordpress)