So I see plenty of designs on here that have smooth shading and what appear to be varying levels of opacity being used. However it seems that every color needs it's own layer if by the off chance it gets chosen to be printed. That's why my designs so far have only used flat colors at 100% opacity. Since a color at anything below is technically a different color?? Maybe I'm over thinking this. Any help would be great because I could create something really sweet if I can incorporate smooth shading.