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Thread: Rendering 101 - Help

  1. #1
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    Rendering 101 - Help

    Attempting to learn how to use Revit as a rendering tool for final output vs. SketchUp and then 3D Studio Max/Photoshop. I have rendered before in Revit in my previous job, but it was so rare that it happened that I don't know the settings. So here are my questions and comments that I found after reviewing the first 6 pages of previous threads.

    1. Revit Light Fixtures right out of the box will all need to be edited to match real world numbers.
    2. Revit Light Fixtures will need a reflective material used on the fixture housing unit. (previous entry only mentioned canned fixtures)

    So here I go. 4 walls, 1 floor, 2x4 ACT ceiling system, (6) 2x4 recessed rectangular light fixtures. Generic Material and then 1 with materials applied. So, if I have a door with light and can use the sun setting for the rendering, I get a ceiling pattern that shows, however it doesn't glow the fixtures. If I use a solid door and rely strictly on interior lighting, the ceiling comes out completely dark. I know an old colleague of mine would use a light fixture "ball" that would not have a housing unit and would place those fixtures in the middle of the space to light up the entire space and then do follow-up work in Photoshop. But it was a LOT of work to follow that method on our end and I know there has to be a much simpler way.

    I am looking for anyone to tell me how to make this image work if I had strictly all interior lighting. Ideally I would like to see the electrical fixture library be a "smart" library so I can just grab and use and not have to worry about starting from the beginning each time.

    Rendering 101 - Help-test_elec_michelleb.rvt_2014-oct-13_02-42-43pm-000_3d_view_1.pngRendering 101 - Help-test_elec_michelleb.rvt_2014-oct-13_02-46-43pm-000_3d_view_1.pngRendering 101 - Help-test_elec_michelleb.rvt_2014-oct-13_02-57-26pm-000_3d_view_1.png

  2. #2
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    Under your render settings, Lighting; do you have Exterior: Sun Only as the scheme? You'll need to change that to Interior: Sun and Artificial.

    The OOTB lights should work.
    Attached Thumbnails Attached Thumbnails Rendering 101 - Help-lights.png  
    Last edited by dzatto; October 13th, 2014 at 09:33 PM.

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    Moderator cellophane's Avatar
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    Munk has an awesome thread going through all the rendering settings: http://www.revitforum.org/rendering-...ghts-only.html it's a couple years old but I don't believe there have been that many changes to the render engine since it was written.
    GenreNomad and dzatto like this.

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    Member TheRevitKid's Avatar
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    I am still trying to figure out what you have going on for the last rendering you show... I can't even reproduce that if I tried... Can you take a snap shot of your render setting for the really really dark ceiling one?

    Also, most of the lighting fixtures will show glowing but some will not... If you want to make them "glow" or look like they are turned on I have a tutorial for that here:

    Revit Tutorial - Show Lights Turned On in Renderings | TheRevitKid.com! - Tutorials, Tips, Products, and Information on all things Revit / BIM

    I hope that helps!

  5. #5
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    In the scenario where the door had glazing... interior and exterior (Interior). In the solid door scenario.... Interior Artificial only.

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    Member TheRevitKid's Avatar
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    Something is not right.... This is what I get with OOTB lights and a quick scene (rendering "Interior - Artificial Only")
    Attached Thumbnails Attached Thumbnails Rendering 101 - Help-rendering-test.jpg  

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    Yep, same as the one I posted.

    I did notice that his lights aren't the troffer lights we are using. His have what looks like a plastic lense on them.

    Maybe that's the problem? I don't know if that is an OOTB light or not.

  8. #8
    Member TheRevitKid's Avatar
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    Quote Originally Posted by dzatto View Post
    Yep, same as the one I posted.

    I did notice that his lights aren't the troffer lights we are using. His have what looks like a plastic lense on them.

    Maybe that's the problem? I don't know if that is an OOTB light or not.
    Yeah I am thinking its the lights as well... But, I still feel like the light source would be enough to get some ambient lighting on his ceilings (like our renderings). IU am not sure why his ceilings are black...
    dzatto likes this.

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    Forum Addict tzframpton's Avatar
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    Quote Originally Posted by TheRevitKid View Post
    Something is not right.... This is what I get with OOTB lights and a quick scene (rendering "Interior - Artificial Only")
    It's too low of a rendering setting. Gotta bump it up so the rendering engine can process the lighting better, which will rid the weird lighting artifacts you see.

    This is my first assumption though, without any prior experience with the model you have.

    *EDIT*
    Also, anything you can find on the internet related to 3ds Max rendering, etc... it all still applies in Revit. So realistic lighting can be accomplished to a pretty good degree if you read up on how the Max pro's handle it.
    Last edited by tzframpton; October 14th, 2014 at 05:49 PM.

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    I started my reply this morning, hit post after several hours... turns out it times out on you. So here I go again.

    Thank you so much for helping me out... this is awesome to have some nice support!

    Here is what I have regarding questions:
    I rendered all 3 of the original images using Revit Cloud, on Medium.

    After I sent the question on the Forum, I was playing around with the ceiling material and found an "Illumination" button that I could check. I did.. and viola... I have a ceiling. Since I was asked what my rendering settings were, I put my ceiling back to what it was... (no illumination checked) and rendered using CPU and rendered using Cloud... for some odd reason, I have a ceiling. I am unable to replicate myself the solid black ceiling. So maybe it was a one time fluke???

    Rendering 101 - Help-elec-test-finishes-program-rendered.jpgTest - with Finishes - CPU Rendered (ceiling not illuminated) (I then questioned if my flooring was bouncing light back and that was why I couldn't reproduce problem)
    Rendering 101 - Help-elec-test-no-finishes-cloud-rendered.pngTest - No finishes - Cloud Rendered (Ceiling not illuminated)

    Rendering 101 - Help-elec-test-no-finishes-program-rendered.jpgTest - No Finishes - CPU Rendered (Ceiling not illuminated)

    Rendering 101 - Help-elec-test-cpu-renderign-settings.jpgRendering 101 - Help-elec-test-exposure-control.jpg

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