Thank you for your replies, What I did not mention was the fact that the same thing happens If I am using the rectangle or polygon I get just the single end frame. One thing I have noticed is this: If I had a still of a cup and I add a keyframed fast noise to add a steam effect, the effect is then over the full still clip. regarding ‘paint’ it is not the actual build-up of frames, it is just the end result. In other words, If I wanted to remove a tree from a wood and replace it with say a shrub nearby. it is just the end result I was looking for.