![]() ![]() Since your original image is on a layer with its own color, you'll see the new layer's color through the transparent areas in your original image. This happens because you made those areas transparent. Note that the color you selected is viewed through the transparent areas of the original image. For example, if you selected green, GIMP will fill the new layer with green. Click on the layer to color it with the color you have chosen. Click on the "Bucket Fill" tool in the Toolbox window and move to the canvas containing the new layer. Click one of the colors you see in the Change Foreground Color dialog window and then click "OK" to close that window.ĥ. Scroll to the Toolbox window and click the "Foreground" square color at the bottom of the window to open the Change Foreground Color window. This changes the placement order and makes the new layer appear below your original image layer.Ĥ. Click and drag the new layer that you created so that it is below your original image layer. ![]() If you overlap them, the layers near the bottom of the list will only be able to see through any transparent areas of the layers above them.ģ. Layers are like glass panels that contain images. Your original image, also a layer, appears below that new layer. The new layer you added appears at the top of the list. ![]() The Layers window contains a list of vertical layers that exist in your image. Press " Ctrl + L " to open the Layers window if you don't see it. GIMP places new layers on your original image.Ģ. Click the "Layer" button at the top of GIMP's main window and select "New Layer" to open the New Layer window. GIMP will make the selected color transparent.ġ. For example, if you want to select a color from the Color to Helpful Color Picker window, click the "From" text box and click one of the colors in the Color to Helpful Color Picker dialog box and click "OK". Choose the color you want to make transparent with one of these methods. This window displays colors and allows you to click on the color you want to make transparent.ĥ. Click the "From" text box and GIMP open the Color to Alpha Color Picker window. The background and foreground colors are the colors you see at the end of the Toolbox window. You can click on one of these options if you want to make one of those colors transparent. Right-click on the 'From' box and you will see a menu containing the following options: Foreground Color, Background Color, Black and White. There are several ways to put a color in that text box.ģ. This text box contains a color you want to make transparent. This window has a "From" box below the preview image. The Color to Alpha feature allows you to select a color in your image and make it transparent. The Color to Alpha dialog box opens and shows a small preview of the image. Click "Color" from the menu bar and select " Color to Alpha ". Launch GIMP and open a color image that you want to make transparent.Ģ. By using GIMP to manipulate transparency information, you can make a color in an image transparent and replace it with a different color. Many digital images contain information that determines the transparency and color of the image. Install the free GIMP image editor and you can learn how to turn the blue sky into red and make a normal apple become special in blue just by clicking on a button. This will create perfectly seamless PNG textures with GIMP, with no graphical artifacts even when mipmaps are drawn (which is how Unity optimizes distance drawing of textures).Transparent effects may not be interesting until you discover how using them will make your image interesting. Save you PNG file with “save colors from transparent pixels” checked and “save background color” unchecked.Delete the bottom layer so there is only one layer (this is very important because otherwise GIMP won’t save the transparent pixels properly).Return to the layer you eroded, invert selection, then delete.Right click the hidden layer and select “alpha to selection”.Hide the bottom layer, which should still be the same as the original image with alpha and everything.If any areas of your image are still white, paint them with a neutral tone from your image. On this layer, use the “Generic → Erode” filter on it numerous times, 10-20 times should do it.Then, on the middle layer, right click on the layer and remove the alpha channel, then add it back in, making sure your background color (in the color picker) is white.Hopefully, this will clear up a bit of confusion for others with creating alpha map textures with GIMP for Unity. I had some issues getting this to work, but I eventually found a solution. ![]()
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