Virtual reality (VR) is an interactive computer-generated experience taking place within a simulated environment. It incorporates mainly auditory and visual feedback, but may also allow other types of sensory feedback like haptic. This immersive environment can be similar to the real world or it can be fantastical. PTSource VRGrid is a free standard based desktop application and markup language for representing interactive 3D and 2D with VR support. It includes its own scripting language for software design, and a format support for 3D models. The design goals its to emphasize simplicity, generality, and usability.