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Forums >> Revit Building >> Technical Support >> Revit 2009 Lights
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Joined: Fri, Nov 24, 2006
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Hi just started playing with Revit 2009 although been using 2008 previously but never really got round to lighting, just trying a few things today very simple box rooms with a window and door some wall lights and ceiling light, although when i render the lights seem to emit a very very low level of light, what settings need to be changed and altered to enable to room to be lit by the lights. All the lights i have used are from the Revit library. I have turned the light W up to 600 in some cases and the light is begining to emit some light but is still not lighting the room. Could some one please help me get started on lighting as the Mental Ray Rendering system does look very very good and i would like to get the best out of it by adding some lights. Many thanks I have just tried it with the option of artifical light only and it all lights up perfectly, but when i use the setting of artifical light and sun light it goes dark again and the lights appear off. Also is there a way of selecting the windows which you require sun to enter through as in 2008? Thanks again
Edited on: Tue, Apr 22, 2008 at 5:20:48 AM
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Joined: Tue, May 16, 2006
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As I understand it, you do not have to set "daylight" for windows as you did with AccuRender. From the demo's I've seen, the interior lights are very deminished when there is daylighting.
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Joined: Fri, Nov 24, 2006
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Thats what i found once i turn daylight on the lighting is very low and dark, i have now found out you do not directly select doors and windows but just turn the door window porthole setting on. Does everyone render interior views with daylight off then? The only problem with that is that views out the window are all dark then, is there a way to keep the bright lights on and light outside?
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Joined: Fri, Mar 31, 2006
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I am also having trouble with this lighting issue, when I turn my sun on the interior lights turn off or go alot dimmer. This can't be what it is supose to look like. I have been looking through everything and just hope this is not how mentalray is going to make interior perspectives look. If anyone knows what to do please help.
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Joined: Thu, Nov 3, 2005
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I have been experiencing all these problems with interior lights. There are at least 1/2 dozen other threads on this same issue. This must be a bug in the new release. Every view I render is of a black hole with light gray spots where the lights are. I have checked the family properties of the lights and tried using both watts and lumens settings, and also specifying a manufacturers IES file. Same black renderings.
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Joined: Mon, Dec 24, 2007
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Hi just started playing with Revit 2009 although been using 2008 previously. I placed artifical light and tried to render night view. I tried with all the options in rendering dialog box but I am not geting any result. I have attached an image for which I want to make night View. Please help.
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Joined: Mon, Jun 30, 2008
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I have been having the same problems with rendering night scenes for both interior and exterior spaces. I think there is some kind of bug in the system that overcompensates for natural light (natural light is much stronger than artificial). So when natural light is on it simply washes out the artificial lights in the scene. The best luck I have had is to manually adjust the exposure settings once the rendering is finished. It doesn't do much, and it can be a pain in the curse - but if you work at it you can get some results which may work for you. Hope this helps. And if anyone figures out a better way to deal with this please pass it on.
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Joined: Thu, Feb 7, 2008
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Hi all, Been having the same problem... At the moment manually tuning the fixture works for me (ie. adjusting the wattage, luminance and illuminance in type properties) however this might cause problems if used with MEP. For rendering it seems to work though. Ps: color temperature is set to incandescent by default, changing this seems to help.
Edited on: Mon, Jul 7, 2008 at 12:47:29 PM
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Joined: Sat, May 13, 2006
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When rendering with artificial and natural light, check the "adjust exposure" on the rendering image dialog box. Most of the time you're going to want the exposure around 4. When you switch to natural and artificial light it automatically jumps up to 12 which is super dark. Luckily you can adjust this value even after you render. If your renderings look really dark, look at this value and see if adjusting it to somewhere around 4 helps. Good Luck!
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