![]() ![]() Note:This control is disabled unless Use Alpha Bias for Despill is disabled. The most useful colors to pick for Despill Bias are often hair colors and skin tones. Pick the color from the part of the foreground that is affected.Īdjusts the Despill Bias to remove any remaining spill from around the foreground image. If the key is not working too well with these settings, try setting the balance to about 0.05, 0.5 and 0.95 and see what works best.Īdjusts the Alpha Bias in case your screen color isn’t purely blue or green and is causing parts of the foreground image to become transparent. Generally speaking, blue screens tend to work best with a balance of around 0.95 and green screens with a balance of around 0.5. Sets the balance point for the image to key. Sets the screen color to become transparent, usually blue or green background.Īdjusts how much of the screen color is removed to make the screen matte. If you’re using premultiplied images, you should leave this enabled. When disabled, the key result is not unpremultiplied. Composite - this renders the foreground composited over the background using all mattes, spill and color corrections.There’s an Unpremultiply Result checkbox you can use if you wish. Final Result - this creates a premultiplied RGBA foreground that can be composited later.In Keylight nodes down the tree, you should set the Source Alpha in the Inside Mask folder to Add To Inside Mask. This renders the original source image with the Screen Matte generated in this Keylight node. ![]() Use this option on shots that can only be keyed using several different keys on different parts of the image (multipass keying).
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