- Each layer represents the time the maker contributed. 
- Each layer represents the relationship between the time and the size. 
- Each layer represents the processes the object had been developed.
- Each layer represents the connection of the artificial and natural materials.

Using the stumps highlight the wood grain, and connect the resin graphic and the wood grain. This is the last practice for the topic: How can Invisible Process Become Visible?
using the layers to reveal the process and the time designer tributed. Each layers are random and uncontrollable, but they were generated by designer's device. This is the achievement for "Control the uncontroled process."