Lighting Presets Interior - Flip Normals for Interior Scene?

[sadicus]

When rendering with Lighting Presets> Interior, do the normals need to be flipped? (normals on cube interior)
KS7 Scene setup: 1 cube uv maped + 1 camera + 1 Area light (inside a sealed cube)
1) test1 ZBrush cube uv maped, default (normals on cube exterior)
2) test2 Zbrush Flip Normals (normals on cube interior) 
I have yet to notice a difference in KeyShot, it looks the same ,but I don't know why......
(based on the understanding that a face (typically) has one visible side at a time.)

[guest84672]

I'm not sure I understand the question. Normals don't need to be flipped. Are you experiencing any problems?

[sadicus]

It's not a problem ,just trying to better understand how KeyShot is able to "know" how tor read a face normal.
In ZBrush, flipping normals is obvious (you can see the mesh face appear / disappear) Most 3D apps have a face normal pointing in one direction at a time. Looks like KeyShot is able to auto flip or read a face normal depending on the camera view? This will save a step if true.
e.g. In Maya if a camera is placed inside a uv cube you won't see anything unless the normals are flipped.