That tip seems on the right lines, thanks. But I’m still having some problems- firstly I can’t apply the “continuously rasterize” option to the layers that are DV footage. That’s what I painted on.
Secondly, if I copy the paint effect onto, say, an HD-sized solid, then the brushes only take up a small section in the middle of the layer. I can apply “coninously rasterize” on this layer, but then it won’t let me enlarge it to fill the screen. If I then nest it in another comp, I can enlarge it, but I’m not sure that the “continuously rasterize” function does anything when it’s been nested…certainly it looks the same as my original.
Is there any expression I can use to scale up the individual brush strokes and then adjust their anchor points accordingly?
Thanks for your help