Streaks formed on mesh when imported to studio

Hello. I was making a widebody for a meshed vehicle in blender. When I went to import it into studio, it formed these streaks:


In blender, it was smooth and had no streaks:

oh yea heres the thing in edit mode
image

Are you able to show us what the face normals look like?

This tutorial may help you:

image

It won’t help, that tutorial is just for inverting faces.
oh yea and the original body doesnt have the streaks

What happens when you increase the auto smooth angle? I cannot see any properties of the mesh in blender so I can only decipher the problem from the images provided.

Would not help, streaks are still there.
And here are the properties:
image