Results for $R_{2}(\eta^{\rm a}, \eta^{\rm b})$ in p--Pb collisions at $\snn$ = 5.02 TeV as a function of $|\eta^{\rm a}|$ with $1.8|\eta^{\rm b}|2.6$ (blue stars) and $2.6|\eta^{\rm b}|3.2$ (red crosses). Statistical (systematic) uncertainties are represented by vertical bars (filled boxes). Calculations from AMPT with string melting and 3DGlauber+MUSIC+UrQMD are shown as textured and plain bands, respectively.