Other than the shed whose lines are wrong and the foreground that is too expansive (I think I should have a little more sky and less grass/pasture), I'm reasonably pleased, beginner that I am, and I don't see any ugly lines or cauliflowers! The barn grass on the sides should be more random and for the fence posts too I think, and I can do a better job of shading. I started the tree foliage too dark and couldn't vary the values as I would have liked. I can also work at making the corrugated sections actually look corrugated. I also didn't bring my sky to the tape on the right hand side.

I'd appreciate comments as to what I did reasonablely well and what is lacking and how to do better when I repeat this.