OTOY Forums

Hey,

I've got a question concerning Environment Texture with Ambient Occlusion:

I am trying to render an image with sunlight, environment texture and Ambient Occlusion, I am getting black ceilings in interior rooms (picture 1).

When removing the environment texture in AO or switching to Diffuse/PMC/PT, the ceiling is lit correctly with (picture 2: AO).

How can I solve this? Is it a bug or am I missing sth?

Thx in advance for your help

I don't think it's a bug, but rather a feature..when You're using something like HDRi image of SKY, You have bottom half of that sphere black. Try this with full 360 map & I think the result will be different ;)

Hey glimpse,

thx for your answer.

You are right, it's related to the black lower half of the sphere. But when using the exact same settings with any other render kernel (Diffuse, PMC, PT), the render result is correct, there are no black faces.

So I'm still not sure if it's supposed to be like this. And I don't want lightning from "the bottom" .

Or is AO supposed to work like this, using the light sources projecting light directly to the opposed faces of the model? Do you know what I mean?

try to take any spherical panorama and turn it down to pieces === then simulated stars on the ceiling and land on the floor

only take a similar environment .. if the interior is the interior etc

Hi Goldisart,

thank you for your answer. I think I understood now how AO is working. The name should have given me a hint

Cheers