The vehicle’s sensor and camera systems are exposed to various environmental influences. However, even under challenging conditions, fault-free functionality must be guaranteed at all times. When driving in the rain, water accumulations and dirt particles contained therein can lead to reduced visibility of the camera systems. In this context, IAV is developing a simulation model to reproduce the physical processes occurring during such weather scenarios. Thus, it is possible to predict functional limitations at an early stage of the development process and to take appropriate precautions.