Choose any color you like, preferable a color that isn't contained in the actual video, so you don't accidentally make parts of the video transparent you want not to be transparent. I need transparency 100 of the time when i import a picture, because i use the feature for technical drawings that i then align to the grid, just like Nate does it in his screenshot. Step 1 Make sure your After Effects Composition has a transparent background At the bottom of your composition panel on the left of active camera there is a little icon checker box icon (Toggle Transparency Grid), click on and off to switch between the checker background or the black background. (In case of real green screens, you rather use chroma key filter instead of color key filter to allow for regions of different brightness of a actual green screen due to the lighting).
How to make something transparent in paintbrush mac movie#
It's somewhat similar to the green screen technique used in movie production. Apply it to the media source where you play the video created above. In reality the canvas is transparent and when we draw we change the pixel in that spot from being transparent to not. Select a color to make transparent from the Select Color dropdown menu, or by using the eyedropper tool to choose the color in the video preview. Find Chroma Key in the Video tab and make sure it’s box is checked. In OBS, you do this with the color key filter. Make sure your green screen clip is sitting on top of your background clip and double click on it to open the editing panel.
In the app you want to use this video, you need a feature to convert this color to transparent. Now, videos you create have this green in places where you want it to be transparent. It provides users with a means to make simple images quickly, something which has been noticeably absent from the Mac for years. Create an image filled with exactly this green and use this as bottom source in OBS. Paintbrush is a simple paint program for OS X, reminiscent of Microsoft Paint and Apple’s own now-defunct MacPaint. There is no place for a transparent "color" in the common video formats/encoders, so you have to pick and declare one of the existing colors as "transparent".
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