u/specklez1

One of the most common culprits in a piece that isn't working is values. A simple piece of red cellophane will help you see if your values need to be increased or decreased to conform to your composition.

Many people come to this sub for feedback on their pieces.

Oftentimes there are two culprits for a piece not working,composition and values. I hope this is helpful in evaluating your own work. Edit: I was not claiming ownership of this work sheet. There are dozens of these available by different artists available online.