Dome light visibility affecting reflect/refract

[maxedesa]

I'm at my wit's end here! The only difference between the two snapshots below is that the dome is visible in the top, and set invisible in the bottom. There's a window in the scene, so it has to stay invisible, but it should still be seen through the window through reflection/refraction.

Any thoughts?

[hermit.crab]

Turning on the invisibility of the dome light affects the light seen directly by the camera or through refractions (which I think is the cause of the difference). You may bypass this by setting a reflection/refraction environment override (V-Ray>Environment>Reflection/refraction environment).