Hello, I also have problems of convergence with one of my 3D scans ... When I compute NumCalc.exe I don't have any troubleshootings, but then when I launch finalize_hrtf_simulation, it doesnt work because of the non convergence.. I tried to 2 times to make my 3d scan better but it is not sufficient. Can you tell me what do you mean by "trimming the 3D mesh" please ? Thank you !