Lit vs Unlit Photogrammetry

Hi there,

I am having some trouble with a large scanned 3-D model. I cannot seem to find a way to keep the original color and detail of the model like seen in UNLIT. I attached two pictures one with the model LIT and one with it UNLIT. How can I keep the UNLIT detail and color or make the material UNLIT. I am new to Unreal, so maybe this is something very simple that I cannot figure it out.

Thank you very much!alt text