Actors Render Black When Trying To Get A Lighting Pass

I’m trying to get a light map from my scene so I can edit how the shadows appear, but when I try to get a lighting pass, some of my actors appear black like they have no lighting applied to them. I thought that the scene would appear in various shades of white/gray. What could be causing these actors to appear black? I’ve attached four pictures. The first one is a picture of the problem, the second is of my shader graph, third and fourth are of the base color and scene color respectively. My goal is to get the difference between the scene and base color, and to gray scale it so I have the values of my shadows. Any help would be greatly appreciated. Thanks in advance.