If your issue is with a black bottom ceiling which refuses to change color, I had the problem today and resolved it by adding a new layer "finish" under the ceiling with a new layer of 5/8" gypboard, and then I delved into the additional dialogs and changed the colors to white. (It was an involved and trial and error process). Now I do not have the black ceiling any more.
I've attached two images showing the space I'm working on. I've just generically added a ceiling, below the floor, and added 4- out of the box recessed cans from Revit. I cut a Section Box so that it'd actually show up, if I don't have the Section Box, it's ALL black (not just the ceiling).
I've done this same view without the floor "layer" on and it didn't help. My ceiling is just a 5/8" thick "structure" component of drywall, which isn't generic and actually has a material associated with it.
In the "dummy" file I created, I used the same basic set up and I was able to get the lights to appear. However, I used the generic ceiling material and there wasn't a floor. I can't imagine you just can't have a floor above, but who knows.
I can provide more information if necessary.
Thanks again to all of you,
Now serving a big plate of "yes, you're still just learning"...
Even though the image on the screen suggested my camera was not inside a wall, when I looked at it in plan form, it was. I moved it forward a bit, out of the wall, and now things work.
Notes for future forum'ers...
It still requires (at least when placed under a floor element) that the Light Source Elevation remain within the thickness of the ceiling element. I rendered with it outside of my 5/8" material (back to the original 3" above bottom plane) and it did not render. So, light fixtures won't render "inside" a floor.
If you want the fixture itself to have a "glow", you need to edit the fixture's "Light Source Definition" to have it's "Light Distribution" to be a spherical instead of spot. I've attached an image that illustrates this.
Thanks for everyone's help...
Thanks Vector2. That definitely sped up rendering. I did notice the windows rendered black now though. The adjacent door (also using glass as it's glazing material) rendered transparent. Any ideas why? I used your custom rendering settings and did all the different lighting schemes possible and the glazing in the windows always rendered black/opaque...
thaner- Those settings just mean it's not taking all that time
to accurately trace the rays, but it IS filling out the elements,
(except glass), because the antialiasing is set to at least 6.
But that's just for a quick preview render.
For quallity renderings put antialiasing to 9 and those two illumination
precision settings to 9. 10 is infinitely better if you can let it render
for hours and hours. And bump up those other settings a little to give
you the transparent glass. And of course the soft shadows at 8 or 9.
As for some elements rendering black, that's just in their material
We just had this same issue in my Revit class. The problem we encountered - the rendering all black - is that Revit renders doors as being CLOSED. The camera was just on the wrong side of the door! Try moving the camera, see if it's something like that for your issue.
Hope you're well.
There is a black strip that keeps appearing in the render.
I have rendered this same view more than 4times.
I even changed the pendant light and the camera angle without ANY luck!
Please help me with this problem in the attachment below.