Ticking this makes the area inside the mask the focus and the masked area would become transparent.
But first you need to set the control "Mask inside". The next step is to render the clip transparent. Once you have outlined the area required you can feather the edge if needed If you undock the preview window the enlarged image will make this procedure easier to see. You can do this at multiple points to create any chosen shape. You can now grab the dotted line at any point (including the original corners) and deform the mask by dragging the point chosen to another position. Initially the mask is a red dotted rectangle.
This has a small green cross and a black dot. The part of the image required to remain visible can be obtained with the Polygon Mask and the Transparency effect.įor the polygon mask, click the FX box on the clip and then the second button along at the top of the effects pane. However, and depending on the image the following is probably easier. The threshold and fading controls will allow some variation to the effect. When the Green Screen effects pane is selected left click the required shade in the clip preview image. You can colour pick the shade needed with the pipette cursor. Other shades in the clip will remain visible. The green screen effect is good but will render everything in the clip image transparent only if the shade chosen is an exact match.
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