German artist Heike Weber doesn't hold back with permanent felt markers. In fact, she must go through boxes of them in order to create these mind-bending installations!
Before Weber begins, she turns the whole room into a three-dimensional sheet of paper. She then goes to town and creates these psychedelic environments.
Along with using the marker's bold colors, she also manipulates the white space to bolster the effect. The heavy looping creates volume on the walls and floor, making the whole room come alive as if it was breathing heavily.
Heike Weber's website