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Forums >> Revit Building >> Technical Support >> Interior rendering sun intensity

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Wed, Aug 20, 2008 at 11:01:01 PM | Interior rendering sun intensity

#1

jeremiah77769


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I am runing some test renderings for a project I'm working on and I am having some problems with the sun intensity on interior renderings I'm running. I have uploaded one medium+ quality rendering with window portals enabled. The image (attached) comes out almost a wash around windows with the sun being overly powerful. Is there any way to lower the intensity of the suns output. The sun is essentially powerful enough to white out any window completely making them look very messy and washing out all colors outside and anywhere the sun hits directly inside.

Right now I have the settings running Interior renderings with artificial lights enabled. I have the exposure set to about 9 in this shot with the saturation set at 1.1. I'm hoping that maybe there is a way to tone it down a few notches that I'm just missing. This would seem like a simple fix but I'm just not finding it, any suggestions would be appreciated.  



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Thu, Aug 21, 2008 at 5:00:40 AM | Interior rendering sun intensity

#2

Typhoon


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Hi, after render you can use the "Adjust Exposure" to "clean" your render but there are people who said "DON'T GO TO THIS WAY", well then try in settings of render control the parameters of the intensitive of the lights, but you must waste some time to configure this, what i recommend it's: change the parameters and render in HIGH but by REGION and select only i.e. "Half of that small window" then if you see that's OK then render the total image, if not, repeat the process...

 


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Thu, Aug 21, 2008 at 11:07:39 AM | Interior rendering sun intensity

#3

LIZARD2806


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I have not played much with the rendering, but it occurs to me you might try either, A)take two rederings, one as you show it, the other with the brightness turned down (so you can see outside), and overlay them in Photoshop. Or, B) try changing the time of day for your rendering.  I don;t know if these will work and *hope* there is a real solution, but thought I'd take a stab.

Cheers.


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Thu, Aug 21, 2008 at 2:40:36 PM | Interior rendering sun intensity

#4

jeremiah77769


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I have already tried the exposure settings. They have brought me to the shot that I posted here. I just figured there would be a quick way to drop the power of the sun down because its just going overboard with the light. I guess I will try doing another rendering again and export one with settings that I can see the outside then do another export with settings so I can see the interior lighted proper then try working with them in photoshop.

You would think that this should be something they allow you to set from the get-go (sun intensity). I'm feeling pretty let down on most occasions with this cropped version of mental ray. I was really hoping I would be able to avoid using 3ds max and keep it all in one program but it looks like I'm going to have to start bringing my files over to max again for some renderings, sigh...

Thanks for the suggestions though.


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Thu, Aug 21, 2008 at 3:30:20 PM | Interior rendering sun intensity

#5

Typhoon


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Hi, reduce this value and ttry again....

 



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Thu, Aug 21, 2008 at 5:46:29 PM | Interior rendering sun intensity

#6

jeremiah77769


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I tried dropping the indirect precision down to 1 and it still appears the same, I lose a tiny bit of the glare but it doesn't  fix the problem. I then tried turning the "Compute Indirect and Sky Illumination" checkbox off completely. This makes the rendering far darker but the windows are still a complete washout! There appears to be no way to control the suns output. I can only hope enough people complain about this to Autodesk for them to make a change to the program. It's pretty aggravating at this point because having to spend half of my time editing in photoshop is just not an option for me on our time schedule.

Thanks again for the suggestions.

*Edit* I have another rendering running using a higher quality setting which I will post when its completed, just to illustrate my problem further.

Edited on: Thu, Aug 21, 2008 at 5:49:12 PM

Edited on: Thu, Aug 21, 2008 at 5:54:52 PM

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Fri, Aug 22, 2008 at 3:21:50 AM | Interior rendering sun intensity

#7

Typhoon


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Hi again, JEREMIAH did you try to go to SU (sun settings) and try to change that parameters like POSITION of sun and most important change the TIME of the day, put in like 18:00, 19:00...

 


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Fri, Aug 22, 2008 at 1:20:37 PM | Interior rendering sun intensity

#8

jeremiah77769


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I am trying to show in most of the renderings what the sun will be doing at certain times of the day. The first image is in the morning @ approx. 10am and this second rendering is showing an afternoon sun @ approx. 2pm. I dont really have much freedom to change the time, but I have tried a few just because you suggested it. The only way I can get the light intensity down is by dropping the sun past the horizon and basically making it night or near dawn. This kindof changes the colors for the worse though and I just dont think its going to fly. Looks like its back to the drawing board for me...



Edited on: Fri, Aug 22, 2008 at 1:22:00 PM

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Fri, Aug 22, 2008 at 1:59:02 PM | Interior rendering sun intensity

#9

LIZARD2806


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Another thought, have you tried changing the background to Color and choosing a darker blue for the sky? 

 

As I look at it, though, I tend to think of a camera...either you are going to expose for the inside of the room or the outside light, two very different light levels.  To photograph it appropriaitely, you would either wait until it isn;t so bright outside (which you tried by changing the time of day), or you add light to the inside to bring the exposure value closure to that of the exterior.  Maybe if you add a few bright studio lights and then bring the exposure down......

 

HTH


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Sat, Aug 23, 2008 at 5:08:41 AM | Interior rendering sun intensity

#10

Typhoon


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Why not? try what LIZARD said, i'm not tried yet but i do right now...

 


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Sat, Aug 23, 2008 at 8:24:55 AM | Interior rendering sun intensity

#11

Typhoon


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Hi, what i do are, first create a render in "draft" mode to don't waste much time, then i go to the "Adjust Expose" and "play" with these parameters like you can see in the second image, then create a new render with only "Medium" resolution, like you can see in the images attached, you also, after render can change and play with these values until you have the "Perfect Image"...

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43405_image1.png43405_image2.png43405_image3.png

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I Hope and I Wish to LEARN  more, and more, and more.... REVIT

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Sat, Aug 23, 2008 at 2:18:26 PM | Interior rendering sun intensity

#12

jeremiah77769


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I basically think that I'm getting the gist of it now. It still seems like a pretty odd way to have to expose the picture but I've just been making the interior light far more powerful (light intensity), as Lizard has suggested. Seems that having a Sun intensity setting would fix this a heck of a lot easier, but I know how the guys making revit work for the most part, backwards. At any rate, I have one running now that looks like it will be turning out a bit better, can finally see the ground outside and everything inside is still lit well enough. Thanks for the suggestion Lizard, might just save me from having to use 3ds max!

Cheers!


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Sat, Feb 7, 2009 at 3:20:15 PM | Interior rendering sun intensity

#13

tchuparkoff


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How do I get to the "Render Quality Settings"  as mentioned by Typhoon. Thanks in Advance - Thom

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Sun, Feb 8, 2009 at 4:40:01 AM | Interior rendering sun intensity

#14

tim123


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In the render dialogue box go to settings and edit.

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Sun, Feb 8, 2009 at 12:30:16 PM | Interior rendering sun intensity

#15

erland73


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Here Thom....(see the image)

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