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title: "V-Ray Aerial Perspective in Solaris"
canonical: "https://documentation.chaos.com/space/VRAYHOUDINI/113279434/V-Ray%20Aerial%20Perspective%20in%20Solaris"
format: markdown
---
This page provides information on the V-Ray Aerial Perspective LOP in Solaris. Overview The V-Ray Aerial Perspective LOP provides control over the Aerial Perspective settings directly within the stage network. You can access it via ||stage network|| > right-click > V-Ray > V-Ray Aerial Perspective. This LOP offers settings similar to the standard  V-Ray Aerial Perspective  in the V-Ray Renderer ROP. The Aerial Perspective LOP simulates the atmospheric effect caused by the Earth’s atmosphere on objects viewed from a distance, producing results akin to fog or haze. The atmospheric effect works together with V-Ray Sun and V-Ray Sky to calculate an approximation to the aerial perspective effect. Creating and Setting Attributes The parameters that correspond to a USD attribute have a pop-up menu that controls how the LOP node authors the attribute: Set or Create  – Sets the attribute to a given value, regardless of whether the attribute previously existed or not. Set if Exists  – Sets an attribute to the given value only if it previously existed. Use this option to make sure the attribute is set on primitives of the correct type. Block  – Makes the attribute appear to not exist so it takes on its default value. Do Nothing  – Does not affect the attribute, i.e. does not create or change the attribute in any way. Parameters Enabled  – Turns the atmospheric effect on or off. Sun  – Specifies the V-Ray Sun object in the scene that the Aerial Perspective effect is connected to. Distance  – Specifies the distance, in meters, at which the fog has absorbed 90% of the light coming from objects behind it. Lower values make the fog appear more dense, while larger values reduce the effect of the aerial perspective.  Height  – Controls the height of the atmosphere layer, in meters. Lower values can be used for artistic effects.  Inscattered Light  – Controls the amount of sunlight scattered from the atmospheric effect. The default value  1.0  is physically accurate; lower or higher values could be used for artistic purposes. Filter Color  – Specifies a filter color for the fog. Note that the fog color depends on the color of the sky. Affect Environment  – When disabled, the atmospheric effect is applied only to camera rays that hit actual objects, but not to rays that hit the sky. This is because the V-Ray Sky texture already takes into account the amount of scattered sunlight. However, it is possible to enable this option for artistic effects, especially with low visibility ranges.   Affect Background  – Specifies whether the effect is applied to camera rays that hit the background (if a background other than V-Ray Sky is used). This option is enabled by default, but some interesting effects are possible when disabled. Affect Alpha  – Specifies whether the aerial perspective affects the Alpha channel. Primary Visibility  – When disabled, the effect appears perfectly transparent to camera rays.