The View Specific option is a mode that can be enabled from the corresponding button of the V-Ray toolbar. This mode allows modifying those V-Ray parameters that affect the lighting, mood, and composition only within the current view context.

Thus, multiple views of the same Revit project can be rendered under different lighting conditions without the need of sharing external settings files.

It also allows switching between the global light setup (which is shared across all views) and the local (view-specific) one for the same view. This is useful in cases where the same view needs to be rendered prompting different mood, for example under day and night conditions, composed vertically or horizontally, etc.

When View Specific mode is enabled, a blue dot indicator appears next to those settings that are specific for the rendered view.

Views that already have their own settings have a blue indicator in the View Selector list, whereas those that are using the global/project settings have a grey one.

Right-click on any view, displays Delete view settings option. It deletes the view specific project settings from the view. Note that the indicator in the View Selector remains blue, if the View Specific mode is only turned off and not deleted from the view.

If Resolution is the only view-specific setting different from the project settings and its aspect ratio is set to Crop Region, the View Selector indicator remains gray. This is because the resolution width/height are different for each view when the aspect ratio is set to Crop Region.