# Decals and masking in the Water System ## Masks You can use a **Water Mask** to affect the influence the simulation has on specific areas of the water surface. Masks take into account the **Wrap Mode** of the texture on the importer. For **Ocean, Sea, or Lake** water surface types, choose **Clamp** rather the default, **Repeat**.
In this example, the Red channel attenuates the First and Second bands with a gradient. The noise on the Green channel attenuates ripples. See the Water Mask property description for more information. |