An immersive training system, and method performed with such system, which comprises one or more sensors configured to measure at least one response of a user to a three-dimensional (3D) asset of a 3D rendering that is being rendered on a virtual reality (VR) display, the 3D rendering comprising a plurality of 3D assets. The immersive training system and method compares, in real time, the received measured response of the user to a corresponding predetermined user response value to the 3D asset and, based on the user response comparison and a generated user-customized dynamic decision matrix, modifies at least one of the plurality of 3D assets of the 3D rendering. A customized dynamic decision matrix is generated for each user based on, for example, a corresponding personal performance profile and a neural efficiency score.