Can I import Pix4D (*.P4D) files, or parts of the process (PointCloud, mesh) into Drone2Map ?
There is no functionality in Drone2Map to do that, however if you create a Drone2Map project and replace "C:\Users\<user>\Documents\Drone2Map Projects\<project>\process\project.p4d" with the *.p4d file you created with Pix4DMapper it should work.
