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In the top of the Property panel up here we have a whole series of Output settings. These control the output of the RotoPaint node for channels, premultiply operations, formats, and a whole variety of things. The important point to remember is that these settings here affect the output of the entire node. All shapes, all of the paint, everything. The Output field here is currently set for RGBA. That means it's going to put out a four-channel mask or paint.
If you set it for RGB you are just going to get the RGB channels, and of course, if you set it for Alpha, it will only be drawing the mask in the alpha channel. The Output mask is something we will take a look at later. Here is our Pre-multiply setting. If you want to premultiply an image, you get to choose between the RGB layers, all four layers, or just the alpha channel and we are going to take a look at this in our workflow example. Clip two allows you to select whether you are going to clip to the format of the project or the bounding box, or the union or the intersection and so on.
And the Reformat pop-up allows you to pick from any of the predefined formats.
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