Ah, use importing an stl in sketchup is very time consuming indeed. However I was referring to freecad converting the mesh to a shell, then to a solid. Freecad imports the stl fine, but takes forever to convert the geometry. It takes no time with simpler meshes, but all i want to convert is half a f1 front wing, which is quite complex. I'm going to leave it converting over night and if it's not done by morning, I think I can conclude that the mesh might have a hole or 2 in itRicME85 wrote:It will get there in the end, just have to be patient. I have had to wait 13 hours for Sketchup to import an STL file back when Perrin had their LMP car free to download. Wish I still had the file, would be hand right now, unfortunately lost it with a PC crash