Downward facing faces all black

[martinwahlberg]

I couldn't find an answer to this in the forum but it's probably a well known "issue". When I lift geometry from the ground plane downward facing faces are completely black regardless of what material I apply to it. What did I do wrong?
This only happens to surfaces parallell to the ground.
If I choose a very reflective material the "blackness" isn't visible.
In the attached image all materials are the same. All normals checked. Any ideas?

[Esben Oxholm]

Hi Martin.

Try and go to the lighting tab and check if global illumination is active (or pick the 'product' preset in the top).
I guess that will solve your problem.

Best,

[martinwahlberg]

Ah, thanks Esben!
When I switch to interior everything looks good again.

[mattjgerard]

That whole "bouncy lighty" button again. Its caught me a couple times too.