Water is not rendered left and right when looking down

[madebr]

When looking down to the water, there is no water rendered at the left and right sides.

[ghost]

I guess it's culling problem.

[ghost]

Looks like frustum has one axis?

[alex-leleka]

This happens because wave generation in vertex shader moves Z of water surface lower, so perspective projection makes it smaller as it now a bit more far from camera.
Line: ws.z = ws.z + (-1.0+(sin(time + (ws.x + ws.y) * waveParams.x)) * waveParams.y);
Triangles mesh after transformation: