So after about a week of not knowing how to fix this issue, I stumbled across something strange today. I noticed some diffuse colors were applying to the mesh in 3D View: Solid and some werent. Then I noticed my Materials tab looked different on the Materials that applied then the ones that didnt. Pictures Below:
Eventually I found out how to make it say “Use Nodes” again by unchecking this box.
So in UE4 the materials that did not export were the ones that had “Use Nodes” box checked. I hope this helps other people!
The white Materials below in UE4 are the ones that did not export. (The ones that have “Use Nodes” Checked in Blender)
