Dear Aspirant, in order to become a car designer you should have a good knowledge on digital, sketch, AutoCAD Revit LT Suite, ZBrush, Alias, 3Ds Max, Lumiscaphe Patchwork 3D, Blender, HDR Light Studio, SolidWorks, Adobe Photoshop, Creo Parametric, etc. So, you need to gather knowledge on that. I hope youn are clear now. If you have queries feel free to ask. All The Best!!!