Slices of gas particle distributions for two void resimulations. On the left-hand panel, there is an example of an S-type void while on the right-hand panel there is an R-type void. Both regions have a radius, r_void, close to ∼10 |$h^{-1}\rm Mpc\,$|⁠, indicated by the inner circle. The external circle enclose a region of |$3\, r_{\rm void}$|⁠. Different colours indicate particles of different baryon stages: diffuse gas in black, condensed gas in blue, WHIM gas in green, hot gas in red, and stellar particles in yellow.