Polygonal mask

2D Mask  -  Define a 2D mask with a polygonal selection

This mask is defined through a polygon and a feather parameter.

To edit the points of the polygon, you need to use the Edit Mode of the Viewport :

The Edit Mode is relevant to the currently selected element in the Element Tree , so take care that the polygonal mask is currently selected. Now, press [CTRL] and click in the Viewport to create points:

When there are more than two points but the polygonal mask is not closed, it will display a 50% overlay on the whole image. To close the mask, [CTRL] + [CLICK] on the first point:

The points of the polygon can be moved at anytime by dragging them in the Viewport . The only necessary thing is to be in Edit Mode with the polygonal mask currently selected.

To animate a polygonal mask , just drag and drop the “polygonal mask points” parameter inside of the Timeline . Now each key you’ll add on this parameters will concern every point of the mask :

You could also animate all the mask by using Exposed Parameter on the “Points” parameters.

    Oil.createObject("PolygonalTextureMask")