Probably most people working in an industry related to graphics have no idea about this and things mostly work. If you get a dark band around something you can

Probably most people working in an industry related to graphics have no idea about this and things mostly work. If you get a dark band around something you can tweak it until it looks right or is good enough. I'm troubleshooting a problem right now where two separate applications blend images together and the result is different. Both results have been shipped to clients for years and fixing it is more of "tidying things up." But doing it right the first time or being aware helps things look right more often and can enable you to do more complex things without constantly having to tweak the results.