In most of my interior archviz renders I have a single poly item in the background (outside a window for example) which has an emissive texture applied to it, usually a sky or trees. The sole purpose for this item is to be visible, and cast reflections over the entire scene. Problem is this polygon effects the diffuse lighting in the scene do some degree ie: it's diffuse shadows (not diffuse emission) effect the brightness and colour cast. I've tried moving this item as far away in the distance and away from the scene as possible, but it always effects the overall sun and/or environment lighting to some degree.
My emission texture has these flags:
- Visible on Diffuse [OFF]
- Visible on Specular [ON]
- Transparent Emission [OFF]
- Cast Shadows [OFF]
Is it at all possible to have an object in my scene which is only visible to camera and does not effect the lighting or diffuse shadows in any way?