There is great current interest in understanding how the properties of molecules are modulated by aggregation, leading to the emergence of new properties at the molecular material level. We will review our Restricted Access to a Conical Intersection model to explain Aggregation-Induced Emission (AIE) and discuss how the combination of AIE and intramolecular through-space interactions results in the photophysical properties of molecular aggregates and crystals, producing unconventional emission.