Flaoting Geo normal map bake warped?

Asim7

I have this very simple mesh with a floating geo
I don't know why the normal map bake is warped, it's just a flat surface. I can't really make it more flat lol

I can turn off the average normals, but imo I shouldn't have to when the normal is just 1 front facing polygon face.
And turning off average normals ruins the rest of the normal maps for edges and corners.

What am I doing wrong?

Benjammin

You have identified the problem that its caused by the averaged normals, and since your low poly only has the corner vertices to interpolate from, everything is projected from those corners. 
You need to either have hard edges on your low poly, or add more vertices so it has more normals to work with.

Noren

You could also try combining two bakes. Also, if the outer hull is supposed to show up in the normals from the front, make sure to adjust the lowpoly/cage accordingly.