Transparency

https://collection.cooperhewitt.org/objects/18704619/

https://collection.cooperhewitt.org/objects/68267775/

https://collection.cooperhewitt.org/objects/18731643/

Each of these does a good job of showing transparency. Your able to see past the object.

Layering

https://collection.cooperhewitt.org/objects/18730747/

https://collection.cooperhewitt.org/objects/18650815/

https://collection.cooperhewitt.org/objects/68743397/

All of these do a good job of showing layering because your actually able to see that each object within the art pieces are showing layering.