Tall trees point cloud issues

What is “double grid” mean ?

No, it didn’t. This 190 images test has been realized between 60-80 meters (40 and 100 are from others independant test).
Also, we photographed all images in differents angles and trajectories. From top and oblique view.

I precise that we edited images in Metashape and there wasn’t any issues. Everyting is fonctionnal.