I am new to Blender, coming up to speed on many concepts.
I am creating one of these 3D open floorplans. I have a world background image, which emits light in my scene.
Now I have a room which is supposed to be dark (except for a dim light inside), but which has no roof so we can see inside. I cannot figure out how to block the ambient light!
I have tried creating different planes or cubes to enclose this volume, using mixer with "is camera ray" to control the surface's opacity, but nothing works.
This is an example of a shader I have created, for a plane which is supposed to block light, but be transparent to the camera. Setting then blend mode to alpha blend, and shadow mode to opaque for that material.
How should I go about that? Thanks!