Explore the intricacies of soft-particle production modeling in QCD event generators, spanning from proton-proton (pp) to nucleus-nucleus (AA) collisions. Delve into advanced concepts and techniques presented in this comprehensive 1 hour and 35 minute lecture by Lonnblad at the Galileo Galilei Institute. Gain valuable insights into the complexities of particle physics simulations and their applications in understanding collision events across different scales.