In outdoor Mixed Reality (MR), objects distant from the observer suffer from an effect called aerial perspective that fades the color of the objects and blends it to the environmental light color. The aerial perspective can be modeled using a physics-based approach; however, handling the changing and unpredictable environmental illumination is demanding. We present a turbidity-based method for rendering a virtual object with aerial perspective effect in a MR application. The proposed method first estimates the turbidity by matching luminance distributions of sky models and a captured omnidirectional sky image. Then the obtained turbidity is used to render the virtual object with aerial perspective.