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create an alpha channel

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create an alpha channel How to create an alpha channel or grayscale mask ... be retained. Now render out your mask with the Comp View mode button selected. step 05 - return to photoshop ...

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create an alpha channel How to create an alpha channel or grayscale mask with Primatteʼs mask settings. a tutorial for : primatte chromakey make masks in minutes. [ from Digital Anarchy ] f/x tools for revolutionaries. © 2005, digital anarchy, inc :: f/x tools for revolutionaries : create masks in minutes. 2 primatte : create an alpha channel/grayscale mask A question asked frequently by advanced Photoshop users is how to save the mask created by Primatte. Another way to phrase this is asking how to create an alpha channel with Primatte. Either way, you save out a grayscale (black and white) representation of the color defi nition that Primatte creates. This is exactly the preview image that you see in Primattes interface when you click on the Mask View mode button. Why would you want to do this? Well, creating a mask selection or alpha channel will allow you to keep the photo segregated for more editing. Lets say you want to balance the color of the background. Or isolate some facial tonal shifts after Primatte has rendered. The way to create your alpha channel is this: Render out a Primatte mask as you would normally. Then re-render the mask on a duplicate Photoshop layer as a grayscale image. Copy/paste that grayscale image into a Layer Mask on the original layer. Then load in the Layer Mask as selection, and save as an alpha channel. Following are step-by-step instructions to do this. NOTE: For this lesson, we refer to the chromakey color as green. Of course, it can actually be blue or any other solid color that contrasts properly with your subject. This lesson also assumes that you have an intermediate understanding of Photoshop and Primatte. For instance, we do not explain how to duplicate a layer in Photoshop or what the Channel palette is for. We also dont explain Primattes basic masking steps or tools. step 01- duplicate your layer Before using Primatte, you will do a little work in ...

Source: www.anarchyunderground.net

 

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