I saw a set of photos in a display. The backing appeared to be about 1/4 inch thick and a dense white foam. The images were only on the surface, not wrapped like canvas. There was no frame.

What is the material called? Is it something that is done in an inkjet printer and then applied to the backing? Is it something one has done at some vendor?

I would only be using it for personal use or gifts not for money-making.

Comments? Considerations? Experiences?