9/28/2023 0 Comments Gimp editor deleteI will get into these options a bit more later on in this article. The “Add Layer Mask” dialogue box will appear, which allows you to choose from a variety of layer mask options. To add a layer mask, I simply right click on the layer in the layers panel that I want to add the mask to and click “Add Layer Mask” (denoted by the red arrow in the photo above). To do this, I can use a layer mask on the top photo layer. In other words, I want to hide the top portion of the Model in Red Chair photo (without hiding the model), and have the bottom photo layer showing instead. I want to replace the backdrop of the Model in Red Chair photo with the Zion photo. The bottom layer features a rock landscape found in Zion National Park. In GIMP, I have a composition open with two image layers – the top layer is the “Model in Red Chair” image I have been working with throughout the Layers series, and below that layer is an image layer titled “Zion” (outlined in green in the image above). To further clarify this concept, let me show you an example. So, a layer mask has one of 3 jobs – be totally transparent, be totally opaque, or be partially transparent. If I paint white on the layer mask, those pixels will be fully opaque – so it will appear as if nothing has happened to that part of the layer. If I paint gray on the layer mask, the pixels from that layer will be partially transparent. So, when I paint black on my layer mask, any pixels below that area where I painted black will now be hidden on the layer that contains the layer mask. These colors, when on a layer mask, represent full transparency, full opacity, or partial transparency, respectively. Once placed on top of your layer, the layer mask can be one of three colors – black, white, or gray. To break this down into even simpler terms, you need to understand some simple concepts about layer masks.įor starters, layer masks are placed on top of your original layer as a sort of layer add-on. ![]() This differs from the use of the layer Opacity slider as a mask has the ability to selectively modify the opacity of different areas across a single layer.” ![]() What is a Layer Mask?īy the GIMP team’s definition, layer masks “allow you to selectively modify the opacity (transparency) of the layer belong to. ![]() The simple answer to this is that you use a layer mask. However, what do you do when you want to erase or hide part of a layer in a non-destructive way? The article covered the concept by erasing pixels directly on a layer, which I mentioned was a more destructive form of editing. 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.
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