Well, I suppose. But to master it you need to import your own models, apply self made materials, improve sections of the cars, add mapping where appropriate, split materials into sub materials, design the lighting layout etc etc. And that's JUST mastering rendering LFS cars, not making 3D stuff from scratch which is a lot harder though often using different skills.
Being good at LFS renders won't make you good at modelling, and being good at modelling doesn't necessarily mean your good at rendering...