skip missing files and empty clouds
skip missing files and empty clouds

dyoussef/s2p,MISS3D/s2p,carlodef/s2p,MISS3D/s2p,carlodef/s2p,MISS3D/s2p,dyoussef/s2p,mnhrdt/s2p,dyoussef/s2p,mnhrdt/s2p,MISS3D/s2p,dyoussef/s2p