How make HDRI environment reflections inside a room in Cycles?

Support Lighting and Rendering
1

How make HDRI environment reflections inside a room in Cycles?

2

Hi, you can switch off all except Camera in Object > Ray Visibility settings for your room/walls.

Cheers, mib

3

@mib2berlin
Meaning walls will not cast shadows.
In the case we have an open window with some sun lighting, what then?

4

Ah, only disable glossy.

fake.jpg931×651 105 KB

But still only a fake.

Cheers, mib