If you use a format like PNG, the alpha can change the RGB channels. It depends on the version of GIMP that you're using. You need to have the background selected instead of … Have a read of the forums if you don't know what that is, but trust me, you will need to understand and edit it. The article covered the concept by erasing pixels directly on a layer, which I mentioned was a more destructive form of editing. In the layers window you'll see a second thumbnail next to the layer's normal thumbnail. RED defines where gras is, green where dirt is, Blue where stone is and Alpha where snow is. I use 1.2, and I generally use photoshop to apply alpha channels that I make in GIMP. Alpha channels are important for creating transparency. Having an alpha channel visible (solved) 3. To do that you have to use the right button on the mouse to get the image menu and go to layers and add alpha channel. Step Five: Invert Selection. Editing the Alpha channel with Gimp If you're new to modding EQ graphics one thing that's going to drive you crazy is the Alpha channel. I don't use Gimp, but the alpha is stored as a separate channel from the three color channels, so it's probably just a Gimp preview mode that makes it look like they're dependent. Alpha channel question. An alpha channel will make it possible for you to have a transparent background. In my last GIMP Help article, I covered the topic of layer transparency in GIMP – explaining that parts of a layer can be erased to reveal either a color (when no alpha channel is applied to a layer) or a transparent background. Add Alpha Channel to All Layers: 1. I try using the Magic Wand, but it leaves white borders around where the alpha channel and image meet. Colorizing (only) with a Radial Gradient/ Alpha Channel: 8. Bulk removing alpha channel from over 1000 bmp imgs: 8 to make an alpha channel, what I do is select the entire image, copy it, and then do "filters -> colors -> color to alpha"... or in 2.4's case, just "color -> color to alpha". gimp 2.10: 10. When you add an image as a layer in GIMP, typically there will be no alpha channel. How can I fill in the entire alpha channel with a foreground color in GIMP? I have an image with an alpha channel that I'd just like to fill in with one color (e.g., for a sky). Maybe your image is saving correctly but how your are viewing is supplying a black background which would be viewable through the alpha layer? You can later "apply layer mask" to merge the layer mask with the alpha channel. Thus most of my Alpha channel is "empty". (Edit: Just deleting the alpha channel causes any pixels that are not fully opaque to be filled with the background colour - so this, which might appear to be the easy answer, doesn't work) I would do: Add layer mask, init with "Transfer alpha-channel" Bucket-fill mask with white; Apply layer mask; Faster technique: In the Layers window, add alpha channel and layer mask to the layer. From gimp 2.8.22 I've successfully saved an alpha channel in a png image that shows the css background color through the image correctly when used as the src in an img tag in an html file. Click on it to make it the current drawing context. Step Four: Create an Alpha Channel. This means in GIMP most of the Alpha layer is just the checkerboard and only in some parts I see black color. To reach this, right-click on the layer you are using and click “Add Alpha Channel”. Now paste your grayscale image. Step 6¶ After the last step you should get something like this in Gimp. 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