See how i've done this ? First i've added a rectangular layer to the original bump channel . Then i've put my (bad!) wake texture in the layer . And that's it ! With this technique, you can animate the wake by putting a movie instead of the texture, and make the wake follow your boat by changing the layer's coordinates . Just a tip : you won't be able to add the layer to the bump channel directly from the menus . So first, add a parametric mapping and add the layer to it . Then if you want, drag the layer on top of the parametric mapping . Carrara will tell you that you can't put the layer here, but if you force the drop, it should work okay anyway . That's just a way to do it, there are surely others, but i hope it will help you and give you some ideas ! litst