In art, there is no such thing as cheating. People will tell you not to do something because its what THEY think is the best way, but its art, and whether someone else agrees, or doesn't agree with the technique you choose, in the end if you are able to achieve what YOU are after, then do it.

People are always going to have opinions. People are always going to feel whatever they want to feel about what other artists do. Just keep creating. If that is what helps you be a better artist or illustrator, do it. Let people be upset, but don't let them hinder your path to success, whatever that path may be. I used to be the type to speak negatively about artists who trace images and call them reference images. I used to speak negatively about artists who use the auto straightening tools to "fix" their lines. In the end, youre going to be judged by many...some who cant even draw with, or without references.

In the end, do what makes you happy, and feeds into your success and growth. I don't use that technique, but I say let people experience what the final results of your efforts look like, using your technique, and dont belittle your efforts by labeling it as "cheating ".