I need a huge range of vector patterns that will be used commercially on merchandise. Since royalty free sites do not allow commercial use for most of their images, I figured I can create patterns from scratch on my own without using their images at all. These would be simple seamless patterns so they aren't exactly difficult to replicate in illustrator. Ex - Chevron and geometrical patterns.
My question is am I still infringing any legal boundaries? I'm not using their image at all for the creation of my image. But they would probably be exactly the same.