Given that 3D technology is developing and becoming more and more popular, this paper will present one of its many applications. The video game industry is one of the fastest growing industries in the world with earnings higher than the film and music industry combined. With the rapid development of video game technology, it is possible to display increasingly realistic graphics. High display quality and realism contribute to user enjoyment while playing. For the purposes of this paper, a 3D visualization was made for application in a 3D game created using the Unity development program. The purpose of this paper is to show the process of creating a 3D environment for computer games and the tools needed for it. The process of creating a 3D environment for a computer game is quite different from the process of creating an environment for other purposes, such as film, photography, and animation. The thesis will explain the main differencesin 3D modeling, the rules that need to be followed and the importance of their application. The 3D Studio Max program will be used to create 3D environments, and in the later phase Unity, which is one of the most popular programs for creating computer games. In order for the project to be able to be transferred from one program to another, the diploma thesis will also explain the proper procedure of export and loading into another program. The aim of the thesis is to obtain an appropriate environment for the target video game.