“Digital twin” is very trendy expression, but what it covers is sometimes unclear. This popular innovation receives lots of interest from the industry and promises to boost productivity at al levels of the value chain. Why? Because it pushes back the boundaries of the virtual prototypes, allowing engineers to apprehend the product or system inside their environment. This goal can only be achieved through a VR software, in order to visualize the product in the in-service stage, and supplement the 3D model with simulation data.