Description:
<jats:title>Abstract</jats:title><jats:p>The paper deals with an issue of a design, development and implementation of a fully immersive virtual reality (VR) system and corresponding virtual worlds, specified in an object-oriented fashion. A virtual world object structure, reflecting a division of VR system into subsystems with respect to affected senses, is introduced. It also discusses virtual worlds building process, utilizing the software development technique of stepwise refinement, and possibilities of parallel processing in VR systems. The final part describes a VR system that has been implemented at the home institution of the authors according to some of the ideas presented here.</jats:p>