Some pictures

A foggy roller coaster on a surface of genus 2


Yellow and white regions
A surface of genus 7 with one boundary curve is divided into a yellow and a white region. The white region is fixed pointwise by the mapping class obtained as product (in any order) of the 6 green Dehn twists, and it is maximal up to isotopy among subsurfaces with this property.
Surface bundle
A surface bundle over the circle


A “multiplication” of two configurations of unordered points, one one a surface, one on a disc