This can happen when the octree depth 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 octree depth is set. As a consequence, it may be better to set the octree depth and/or degree settings lower to yield a mesh with less ripples.
Octree Depth: 9
Note the orange peel-like surface.
Octree Depth: 7
While lacking crisp edges, this mesh is smoother.
Octree and Degree Explained
Point Cloud Basics