This master's thesis explores how secondary simulations and additional effects enhance the visual realism of fluid simulations in computer graphics. Based on the principles of computational fluid dynamics, a large-scale ocean scene was created in Houdini, featuring a ship navigating through stormy seas. The project investigates modern workflows such as up-res simulations, whitewater, spray, sail dynamics, and wet map effects, while evaluating techniques for optimizing large-scale water simulations. The results demonstrate how secondary effects such as foam, mist, splashes, and wet surfaces significantly improve realism and contribute to more convincing visual effects for film and animation.