You can set the Sag: it is the maximum chord error of the mesh, reducing it improves the quality of the mesh.
In the import settings you can choose the default loader for CATIA V5 files. Choices are:
- SkyPrep internal loader: it's the more reliable loader but it requires CATIA V5 to be installed with a valid license.
- CoreTech loader: no requirements but can still lead to some differences between the CAD file and the SkyReal model.