Skylight Not Transmitting Light

[anthonywPWC]

I have a tubular skylight, but it is not transmitting light through.  You can see that the tube goes all the way through, but it will not show any light when I render the scene.

[barthbradley]

https://knowledge.autodesk.com/support/revit-products/troubleshooting/caas/sfdcarticles/sfdcarticles...

[anthonywPWC]

There is no daylight portal options when I follow those directions.  Also I cannot find anything about discipline under the properties.  The sun is on, because it is coming through my other windows and it is already set to few clouds.

[barthbradley]

Is this like a Solar Tube? Have you tried putting a light source in it? 

[anthonywPWC]

I was looking for something like that.  I am fairly new to some of those aspects to Revit.  So how would I go about adding that in there?  Can I add it in my project, or add it to that family?

[RDAOU]

@anthonywPWC

1. Which Revit version are u using? The settings might differ slightly fro the link provided and (for instance:) 2017.2
2. How did u model it? Is there a mass still in obscuring the light?
3. Did u assign the right material? and what kind of asset did u assign for it
4. can u upload it for check 

[barthbradley]

Post your family

[anthonywPWC]

1. I have 2017.2

2. It was a model that I downloaded, and then had to add the tube to go through the ceiling.

3. I used a mirror material to reflect the light just like it should in reality.

[barthbradley]

I don't think Revit has the intelligence to direct light off of trajectory path that bounces off of angled mirrors.  I'd have to explore this. I'll take a look at the family later and report back other suggestions.

[anthonywPWC]

I was thinking that it would be no different than a reflection in a window.

[ToanDN]

It is a very narrow and long light tube.  It will takes a lot of bounces to get the sunlight down that one.  I am not too familiar with Revit rendering engine so I don't what control the number of light bounces except for the quality settings.

I would just place an artificial downlight inside the tube.

[anthonywPWC]

I tried to add a light source to it just now, and even moved the light source to where it should be at the very end of it, and I get abolutely no light from it.

[ToanDN]

Are you using "Interior: Sun and Artificial" Lighting scheme?

[anthonywPWC]

Yes

[barthbradley]

Either you're not rendering with artificial lights on or the light is not passing through the lens. If the later, you can test real quick by just deleting the lens/glass from family and reloading and re-rendering.

[anthonywPWC]

I do not understand why the light source that I added to the very bottom of it will not emit light.

[ToanDN]

Here is a test with a lightsource inside the tube near the bottom and random sh!tty settings.

[anthonywPWC]

What are your light source settings?  Those exposure settings will just change my picture.  I have everything else in my rendering the way I want it, but the client wanted sunlights and I need to show these, and if there is no light coming through there, I know that they will ask why its not.

[barthbradley]

you have to set rendering to use both sunlight and artificial lights. Where your artificial light source is located at; be it at the top or the bottom of the shaft, depends on where your camera is positioned. Is this an interior rendering or exterior?

[ToanDN]

The light source is created from the OOTB non-hosted Light Fixture family template and manually moved to location in project.

I do not ask you to change the exposure.  I did it merely to indicate putting a light there works.  You just need to control the light intensity and location to your liking.

I am running a test render with the artificial light OFF.  I will post it when I see something worthy.

okay here goes: