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Thread: Interior Rendering Recessed Can Hotspot

  1. #1
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    Interior Rendering Recessed Can Hotspot

    Hey all,
    Been using these forums as my How To Guide while I've been learning REVIT over the past two weeks or so. Im currently working on an interior rendering and I still havent been able to master the lighting in Revit. I dont want the lighting on the walls to be so intense. The hotspots are so strong and dont seem to fade much.
    Rendering Settings:
    HIGH 300 DPI
    DAYLIGHT PORTALS ALL ON
    INTERIOR: SUN & ART.

    EXPOSURE: 9
    HIGHLIGHTS: 0.4
    MID: 0.75
    SHADOWS: 0.2
    WHITE POINT: 5500
    SAT.:1

    Lights are pretty much all 4" Recessed cans (revit in-box) INITIAL INTENSITY of 600W @14.25lm/W, INITIAL COLOUR of 5000k
    First image is my rendering and second is what I've been trying to emulate. How can I get my lighting to replicate that of the photograph?

    EDIT: Time of day is set to Sunset, so not much influence from Sunlight, but still a bit
    Interior Rendering Recessed Can Hotspot-test-2-9-.4-.75-.2-5500-1-high-daylight-portal.jpgInterior Rendering Recessed Can Hotspot-insp..jpg
    Last edited by phineas; March 19th, 2014 at 04:34 PM.

  2. #2
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    Even if you don't have a solution for me, feel free to give any sort of criticism. I appreciate it all.

  3. #3
    Moderator cellophane's Avatar
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    You will need to adjust the light properties. Look at the Light Loss Factor, Initial Intensity, Initial Color and so forth. I don't know enough about what to adjust to tell you more though =/

    I put together a quick shot using the OOTB recessed cans and got something closer to what you want without changing any settings. Rendered at Low, Interior Lights only, default scene settings.
    Attached Thumbnails Attached Thumbnails Interior Rendering Recessed Can Hotspot-light-settings.png   Interior Rendering Recessed Can Hotspot-rendering.png  

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    Thank you for the reply and for taking the time to setup a quick scenario, its very kind.

    Those are the three settings that I've been messing with for a while. Initial colour I don't have much leeway with because I want a relatively white light. Initial Intensity I've been playing with the most. Other forums have mentioned that Revit light isnt exactly realistic and they often boost Initial Intensity to almost 10x the default setting. So I've been messing with it. But the light seems too focused and not diffuse (I think that's the right term) enough.
    Jax likes this.

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    Forum Addict GMcDowellJr's Avatar
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    Looks like you have your lights source up inside the can. The hard edge you're seeing is the shadow from the edge of the can. You'll need to move your light source down flush with the face of the can.
    tuekappel likes this.

  6. #6
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    GMc, thanks for the response. I had thought that too when I first saw the hard edge, but I figured since it was OOTB that REVIT knew what it was doing so I decided not to change it, thinking that Revit supplied the fixture with the most realistic setup. I will try that immediately. Thanks again.

    Any idea on how to get the light to be more diffuse (ie light up the ceiling and just have a more ambient light quality)?

  7. #7
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    I have tried to put studio lights to illuminate the ceiling and create some more ambient lighting but the orb generated by the studio light appears in the reflection in the sliding glass door. Is there are way to hide the orb of light?

  8. #8
    Forum Addict GMcDowellJr's Avatar
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    Quote Originally Posted by phineas View Post
    Any idea on how to get the light to be more diffuse (ie light up the ceiling and just have a more ambient light quality)?
    Using IES files is the only way I know. In other rendering engines (like Maxwell Render) you could model the light fixture "accurately" and it would take care of that itself but not with the Mental Ray engine Revit uses.

    Quote Originally Posted by phineas View Post
    Is there are way to hide the orb of light??
    I don't think so. Again, in other engines (probably even in the Max version of Mental Ray) you can selectively hide objects from reflection, illumination, shadows, etc.

    I think the solution is, in part, to work on the exposure settings (OTB settings aren't very good).

  9. #9
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    Hmmmm... Okay thanks. I think what I may try to do is get the lighting I want with studio lights. Then redo the same rendering without the studio lights and just photoshop the two together removing the orb.

  10. #10
    Member kowen1208's Avatar
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    Couple things I would try:


    • Adjust ambient lighting and ambient shadows
    • Make sure the can material is a reflective material

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