Turbidity– Determines the amount of dust in the air and affects the color of the sun and sky. method and uses a different ground and sky gradient. Hosek et al – When selected, the VRaySky procedural texture will be generated based on the Hosek et al. method.ĬIE Clear– When selected, the VRaySky procedural texture will be generated based on the CIE method for clear sky.ĬIE Overcast – When selected, the VRaySky procedural texture will be generated based on the CIE method for cloudy sky. Preetham et al. – When selected, the VRaySky procedural texture will be generated based on the Preetham et al. Sky Model – Determines the procedural model that will be used to generate the VRaySky texture: The visibility of the light with respect to reflections is controlled by the Affect Specular and Affect Reflections options. This parameter only affects the visibility of the light when seen directly by the camera or through refractions.