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MASKA for windows instal4/2/2024 Duplicate the Base Layer ¶Įither through the menus, or by Right-Clicking on the base layer in the Layer Dialog: This is easily achieved by duplicating the base layer, and desaturating it using Luminosity as the conversion option. To begin creating the masks we will need to first get a luminosity representation of the image. Lights (left), Mids (center), and Darks (right) If not (or you just want to brush up), I recommend you read through the Layer Masks tutorial first.įor this tutorial I’ll be using this image by the West Arctic National Parklands: Mountains as Far as the Eye Can See ( cc-by)Īfter going through this tutorial, we will generate channels in GIMP corresponding to these six different luminosity regions in the image:Įxample luminosity masks. This tutorial will assume you are already familiar with layer masks. Need to brighten up the mid-tones in an image without effecting shadows or highlights? Want to split-tone an image with different colors? Need to increase contrast only in the darkest shadows? All of these are trivially easy once you begin considering your image as a collection of tonal ranges. The benefit of using these types of masks is that when targeting tonal ranges the mask itself is self-feathering, helping to avoid problems with blending and hard transitions.īeing able to selectively modify an image based on particular tonal regions can be a very powerful method of editing. They are derived from the image data itself, and focused on a specific range of tonal values. Luminosity masks are basically layer masks that are built around specific tones in an image.
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