There are five typical problematic results after running DSM:
• there are too few (or no) 3D points in the resulting cloud.
• there is a lot of noisy data - 3D points in the wrong place forming a messy cloud.
• there are noisy 3D points along the edge of the meshes.
• there are bumps on the surface where not expected.
• low-angle photo projects are difficult to process.