I am generating synthetic images of the sea with boat on it. I want to create a mask for these images with a different color for the sea, boats and their wakes. I had no problem to assign a different color to the sea and boat exploiting the ID mask in the compositing, but I don't know if it is possible to assign an ID to the wake, that was created with the dynamic paint's paint mode. I didn't use the Image Sequence surface format but the Vertex one. Can I assign to the drawn wake an ID? Or is it possible to simply show it in the compositing node tree exploiting a certain node? I think I can use the Wetmap Layer, but I don't know how.