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Howto:Multi-channel lightmap: Difference between revisions
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Change the color selector to black by clicking on it and choosing r = 0, g = 0, b = 0, apply. | Change the color selector to black by clicking on it and choosing r = 0, g = 0, b = 0, apply. You should now have a simi-transparent layer that will become the alpha channel of the four-channel lightmap. | ||
[[File:Tutorial 08.jpg|400px|Color to alpha details]] | [[File:Tutorial 08.jpg|400px|Color to alpha details]] | ||
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While there may be other ways to do this step, I used a mask to add the alpha channel created previously back | While there may be other ways to do this step, I used a mask to add the alpha channel that we created previously back into the final four channel image. The order here is tricky. First add a layer mask to the three channel layer you created previously by "addition" for the alpha channel to be copied into later. | ||
[[File:Tutorial 12.jpg|400px|Add layer mask for alpha channel]] | [[File:Tutorial 12.jpg|400px|Add layer mask for alpha channel]] | ||
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Copy the greyscale layer you want to | Copy the greyscale layer you want to become the alpha channel to the clipboard. | ||
[[File:Tutorial 14.jpg|400px|Copy the alpha layer]] | [[File:Tutorial 14.jpg|400px|Copy the alpha layer]] | ||