This can happen when the detail level is set too high relative to the quality of scan that was captured. In other words, a low quality scan typically doesn’t result in a great mesh, regardless of how high the detail level is set. As a consequence, it may be better to set the detail level lower to yield a mesh with less ripples.
Detail level: 9
Note the orange peel-like surface.
Detail level: 7
While lacking crisp edges, this mesh is smoother.
Point Cloud Basics