Zero Artificial Lights??

[thand]

Hi,

I'm having a problem with my interior renderings. I want both sunlight and my artificial lighting to render in a scene. However, when I set my lighting scheme to "Interior: Sun and Artificial" it completely ignores my artificial lights. Now, we're not talking about my lights not being bright enough and getting washed out by the sunlight. For purely testing purposes I have each of them cranked up to 100,000 lm (~650 watts) which definitely ought to show up as at least something even during the day.

When I hit the "Render" button, it lists " Artificial Lights: 0 " (Attached Screenshot)

As far as I can tell, the program is simply ignoring them completely, despite the fact that I have my scheme set to "Interior: Sun and Artificial".


Is there some other setting I'm missing here? All lights are set dimming = 1 and (at the current intensity setting) completely wash out the scene when I set the lighting scheme to "Interior: Artificial only". Also, when I set "Interior: Artificial only," the "Rendering Progress" dialog box shows "Artificial Lights: 30" (Attached Screenshot 2) as it ought to.


Thanks very much in advance for any help you can offer.

[ws]

I seem to remember discussion about this last year but can't find the posts.

FWIW I avoid using interior lights and rely on light coming from outside on the few interiors I do, but on any interior I always have to use the 'Edit' option from the 'Best... Draft' quality drop down list, then copy high or best to the custom profile in the dialog that opens and then Edit that...
Scroll to the end of the list and tick the boxes for daylight portals.

No idea why, but it always works for me - might be worth a play around with until someone who knows what they are doing turns up to make a suggestion.

[cdatechguy]

Are you using lights from a previous version of Revit? I had issues like this when I opened a 2008 model in 2009 and tried to render...

Updating all my lights to the 2009 version worked great....

[thand]

Thanks for the info. We will give it a try.

Thanks

[sjsl]

You will most likely have to boost the wattage a ton to see the interior lights. I would create two light groups one for interiors only and the other for sun & artficial

[mark.98140]

the key is definetely to up the wattage to ridiculous levels... balanced lighting in the version of mental ray we have is handicapped to put it mildly, thanks again autodesk!.

[trombe]

the key is definetely to up the wattage to ridiculous levels... balanced lighting in the version of mental ray we have is handicapped to put it mildly, thanks again autodesk!.

Mark,
was that only done in Revit ?
Can I ask the time to render please
thanks
trombe.

[mark.98140]

renderings completed in revit, with photoshop sky added later. render times, not too sure anymore, believe it was about 5 hours high, 150 dpi on old machine... lights do tend to kill render times somewhat... though i never personally find the need to use daylight portals.. which helps a little.