J'aimerais mettre à une image png, l'effet saber, j'y arrive mais ça s'arrête aux bords de l'image pgn, et j'aimerais que l'effet continue jusqu'au bords de l'écran.
Try applying the "Grow Bounds" effect, which is located under Effects > Utility. Make sure that it's the first effect in the chain, as it needs to expand the layer before any other effects work on it.
Another method is to pre-compose your layer. Select the option to move all attributes and create the pre-comp. Then, apply your Saber effect to the pre-comp layer. You’ll notice that the pre-comp layer bounds now extend to the edge of the composition, so your applied effect will extend that far as well.