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Stop motion studio pro green screen5/27/2023 It isn't diffused, and a large hot spot has appeared. Here you can see a light underneath our table shining it up at the screen. Both problems can be solved by pointing the background light at the screen indirectly, or diffusing the light by shining it through a semi-opaque material. Also avoid "hot spots" of light which create washed out areas on the screen. It's important to not light the screen too brightly, as this can cause colored light to "spill" onto the subject in the foreground. This controls shadows, and ensures that the key color is showing clearly. It is not difficult to light a scene for chroma keying, as long as you are using at least two light sources, one for the foreground, and another for the screen itself. The frame below is a good example of this. Small issues will be hidden if your camera & lens setup has a low depth of field, blurring out the background. As mentioned previously, you'll want to make sure that the surface is free of wrinkles and other blemishes which may show up as imperfections in the key. Set your screen some distance behind the animation set. Green and blue tape is also available, if you need to cover small areas up. The film crew painted the whole wall green and filmed their scenes in front of it. This picture was taken behind a warehouse where a TV show was being shot. Misc Chroma Key Materialsįor specialty applications you can buy green and blue chroma-key paint. The only downside of panels is the size - 5' x 7' can be a bit big for most animation spaces, and these things take practice to fold up properly! However the size can be a plus if you don't have a stand to hang material from, you can simply lean the panel against a wall and animate in front of it. These are big sheets of chroma-key fabric encircled by a springy frame, which - when unfolded - expand to 5' x 7' feet or more! Some come with blue on the front, and green on the back, which is super handy. Chroma Key Pop-Up PanelĪnother option to consider are pop-up or collapsable "panel" screens. It can also be stretched out and taped to a wall, which minimizes wrinkling. The picture was taken before ironing, so you can see there's a lot of wrinkles!Ī plus of using fabric is that you can cut it into smaller sizes if you need to. They're cheap and can be used as stands for pretty much anything, if it's not too heavy). In this picture we're using two microphone stands with a piece of pipe between them as a hanger (we're a big fan of microphone stands around here. If you buy green screen fabric, you'll probably need to run an iron over it before use, since wrinkles will produce shadows, which effect the quality of your key. Make sure that the color is a rich colorful blue or green, not light blue or turquoise. You can also stand it up on your animation table, or tape it to a wall. Here we've attached a piece to a microphone stand with a clothespin. Since you typically don't need a lot of screen material for stop motion sets, green and blue poster board can be the cheapest and easiest material to use. You can buy chroma key fabric, collapsible pop-up screens, or simple sheets of poster board. There are many kinds of chroma key screens available.
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