Exclude objects from VraySun Direct Illumination

[rjohnson33]

Could someone let me know if this is this possible or not when using the VraySun?

I've got an interior scene lit by VraySun and VraySky (in the environment slot). I find this best at present for clarity of GI in the interior but I'm trying to use
a cylinder outside with a vraylight material mapped with a sky for generating reflections and for the appearance of the sky itself outside of the windows.

The cylinder is set to cast no shadows or generate/receive GI and it is selected in the VraySun 'exclude' list as excluded from shadow/illumination
but it is still being blown out by direct illumination from the VraySun (disabling the sun makes the sky appear as it should). Is this unavoidable?

[rjohnson33]

Sorry, ignore this, it's not as I thought. The VraySun's illumination isn't having any effect on the 'excluded' cylinder.

It's actually because I'm viewing the cylinder through double-glazing which is catching very strong sun-coloured reflections from somewhere making it appear as though the
cylinder itself is being changed by the sun's illumination.