The rendering of the large landscape scenes is impossible without simulation of meteorological impacts and atmospheric phenomena. Four types of the meteorological impacts, such as wind, fog, rain, and snow, are discussed in this chapter. Additionally, the water surfaces and cloud simulation are considered. Great variety of methods can be classified as the physical-based, computer-based, and hybrid approaches. In this chapter, it is shown that many natural impacts are successfully described by the Navier-Stokes equations. The main goal of the computer-based methods is to provide the real-time implementation to the prejudice of the realistic rendering and modelling accuracy. Nowadays, the hybrid methods become popular in virtual reality and computer games, likewise in forest monitoring and inventory.