For vector graphics use Adobe illustrator. Try learning a 3D modeling program (not sure which type of engineer you are). Don’t worry about not being able to dra

For vector graphics use Adobe illustrator. Try learning a 3D modeling program (not sure which type of engineer you are). Don’t worry about not being able to draw well with your hand. I’m an architect and use pen+paper for thinking something through, then use software like illustrator to execute.