Pix4D along with Aeryon Labs have produced a UAV system that creates 3D models based on images from lower grade cameras (compared to traditional aerial survey sensors on airplanes and helicopters) on UAVs. The test structure was the 30m Christ statue in Rio de Janerio. It pieces a 3D model by using overlapping images from the UAV sensor. The article mentioned that a LiDAR sensor equipped UAV would not have been a useable solution based on size, shape, and location.
The article also mentions that this is a small scale solution for 3D modeling, but given the low flight acquisition costs, it has potential to be a cost-effective capture technology and be widely used, raising the the oft-mentioned data privacy rules that are going through regulation review in many countries (e.g. FAA in the United States).