  In hydrodynamicalmodeling of heavy-ion collisions the initial state spatial
anisotropies translate into momentum anisotropies of the final state particle
distributions. Thus, understanding the origin of the initial anisotropies and
quantifying their uncertainties is important for the extraction of specific QCD
matter properties, such as viscosity, from the experimental data. In this work
we study the wounded nucleon approach in the Monte Carlo Glauber model
framework, focusing especially on the uncertainties which arise from the
modeling of the nucleon-nucleon interactions between the colliding nucleon
pairs and nucleon-nucleon correlations inside the colliding nuclei. We compare
the black disk model and a probabilistic profile function approach for the
inelastic nucleon-nucleon interactions, and study the effects of initial state
correlations using state-of-theart modeling of these.
