I have drawn with the brush some lines, then rasterized and filled the areas with the fill tool. save as .AI and that I imported in After effects.
This should be all good but when looking closer, I can see white thin lines around the original brush strokes. I double checked and there is no border activated, so I don't know where those lines are coming from and how to get rid of them.
Those are really thin..do they show up when on FULL? A simple choker with a very low value should be a useable workaround. Another workaround would be copying the paths in illustrator and pasting them on to solids in after effects...So there is no stroke effect on illustrator? Even if it is set to 0 if it is on it might be causing this.