Low Poly Export Problem

[creatorlater]

Hello, I'm quite new to Wings3D and I've stumbled across a problem.

I decided to try using Wings3D instead of Blender and I started off by making a simple low poly tree.
low poly tree 1 (click here)
Overall, I was very happy with the cartoon-y look when I exported it into Unity .
low poly tree export 1 (click here)

I decided to make another tree.
low poly tree 2 (click here)
I was also very happy with the cartoon design of this one until I saw the curved render .
low poly tree export 2 (click here)
I made a bridge, ground plane and a pine tree after that with no sign of the cartoon-y look coming back.

Any way to get the low poly look back? Possibly, it was my fault as I might have messed up the settings. Thanks!