Vray RT does not render lights - help

[mko710]

I am trying to render out lights in revit. The revit render engine does show them just fine but when i use gray RT they do not illuminate. what am i doing wrong?

I am downloading the lights from companies with the IES files, but only one particular light is rendering the source while the others do not.

[Ana Lyubenova]

Do you get any error messages?
Which version of V-Ray|Revit do you use? (you can find it in the About box after expanding the Help menu)

[mko710]

yes there are yellow text saying " [WARNING] V-Ray: Could not load IES File C:" I checked the lights and the photometric web is in the family and the folder

I am using the Vray 3.4

[Ana Lyubenova]

I'm asking about the version V-Ray|Revit at the bottom of the About box (e.g. 3.40.02)

[mko710]

sorry

V-Ray | Revit Version 340.02
V-Ray Core Version 3.40.4

[Ana Lyubenova]

Can you try to replace the IES files with any of the generic Revit IES files; and then message me the result.
Revit IES content is stored here: C:\ProgramData\Autodesk\RVT 2017\IES

[mko710]

no luck :/

i went ahead and changed them to generic ies files and still no luck. I did realize that some of the IES files i downloaded did not make it over to that folder. i moved the IES files into RVT2017/IES thinking that would solve it but Vray RT is still not allowing the lights to render.

I am aware that some IES files i do not have hence the warnings, but the other lights i should have no issues with?

I attached screen shots of both revit render and vray rt below

[Ana Lyubenova]

We are aware of such problem which will be fixed in our next update.
Until then can you try the workaround described in the following thread: https://forums.chaosgroup.com/showth...p-render-error
Let me know the result.