Like any other node, RealWave also has its own display options. There are 4 functions:
Making a surface invisible in the Viewport is handy when you are evaluating the motion of rigid bodies which are influenced by waves, or the distribution of crest particles.
A RealWave mesh consists of polygons, similar to RealFlow objects, and it is possible to visualize their normals. You can choose between “Yes” and “No”.
When “Show normals” is set to “Yes”, you can control the length of the normals here.
If you want to show a textured view you can use either "Depth factor" or "Foam".