Hi
The green screen effect is good but will render everything in the clip image transparent only if the shade chosen is an exact match. Other shades in the clip will remain visible. You can colour pick the shade needed with the pipette cursor. When the Green Screen effects pane is selected left click the required shade in the clip preview image. The threshold and fading controls will allow some variation to the effect.
However, and depending on the image the following is probably easier. The part of the image required to remain visible can be obtained with the Polygon Mask and the Transparency effect.
For the polygon mask, click the FX box on the clip and then the second button along at the top of the effects pane. This has a small green cross and a black dot. (Add effect mask). Initially the mask is a red dotted rectangle. 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. You can do this at multiple points to create any chosen shape. If you undock the preview window the enlarged image will make this procedure easier to see. Once you have outlined the area required you can feather the edge if needed
The next step is to render the clip transparent. But first you need to set the control "Mask inside". Ticking this makes the area inside the mask the focus and the masked area would become transparent. Unticking it makes the area outside the mask masked area the focus and this would subsequently become transparent.
In your case as you would have masked out your lady on the mat so untick the box. Now add your Transparency effect (Tick the green cross and select Transparency). and set the value to 0.00. (0% Opacity = 100% transparent) Your lady on the mat will now be the only part of the clip visible. Obviously both effects can be controlled with keyframes if animation is needed. Also the clip should be placed on an overlay track.
The above is a rough example. The cartoon image on Track 2. The polygon mask is on the left drawn on the cartoon, box unticked and with 100% Transparency the background now transparent is against a black blank frame on track 1 but you can use any image/clip you wish for the background. (Note: No green screen required) I am using VP v 5.20.
Hope this helps
Nat
