Ref Use

"In studies based on reference images, I've quoted the source wherever possible, or asked the ref creators for permission to use. Even though my studies are for non-commercial, educational purpose under Fair Use guidelines, I do not wish not to give them credit. I'm entirely grateful to them for helping extend my knowledge and skill. There are instances where I couldn't trace the source, or obtain permission, and I'd gladly modify these instances if found and communicated to me."