Nanoleaf is well-known as being that company that makes those lovely glowing tiles that you can hang on your wall. The only thing ... solid lid and a translucent acrylic sheet to act as a diffuser.

Panels like Art3d's Decorative 3D Wall Panels in Diamond Design are popular ... cardboard-suitable glue, primer, and acrylic or spray paint. You may also need a foam board or additional cardboard ...