ICAREUM is a decentralized online service for creating of interactive architectural visualization. ICAR could be the provider considering modern computer game technologies, allowing to develop interactive visualization of architectural ideas or home design projects of any scales. It is, in own way, unique online architectural – IT service allowing to convert architectural 3d drawings into a minicomputer game with high specs and realness of materials, textures, environment and natural phenomena with a chance of manipulations with objects and interactions with them in genuine time. Our software item allows to visualize not just architectural kinds, but additionally a landscape of the represented land plot – precisely by a topographical survey.