Should I work on every piece till it's fully finished or

>>3065183
however you want, silly

>>3065242
I mean what is more efficient when it comes to learning

>>3065183
Do both long studies and quick ones. You will learn different things from each. They are both important. What proportion you do of one or the other is up to you and your goals (ie and animator is heavier on the shorter studies and a classical fine artist is heavier on the long studies)

>So what's the right approach?

There isn't one, it should be tailored to your goals. It doesn't matter if you become the best rendermonkey in the world if you want to be an animator, does it?

Speaking generally, when it comes to those really fancy, super-rendered pieces, almost all the hard work is done in the first 20% and the last 80% is rendering, which is more a matter of patience (though obviously there's a skill to good rendering as well). Learning to render well is important, and you should finish pieces regularly, but finishing every piece means you're basically spending 80% of your time learning to render and 20% learning everything else. I'd argue that's far from optimal.

>>3065263
starting a new one is more efficient in my experience. start a new one and try a different approach and repeat. if you feel like you would learn something by being more detailed like getting a texture or material right then do that