Lighting effect
The following screenshot is taken from a road that consists of several equal parts:
They all belong to a Blender model and have Shading set to Flat.
The scene has just one directional light and the parts of the road are used to bake a light map.
Material is set to use Mobile / Vertex Lit (Only Directional Lights) shader but I tested other shaders like Mobile / Unlit as well.
I don't get this effect when I take a model consisting of 8 road parts using a repeating texture - at least not in the middle. So it's not related to broken tileability of the texture. But it is visible then at the end as well
The texture import settings are:
Question: Is this the regular behaviour of the standard shaders? Can't believe it, but If so how to omit this when writing my own shader?
I would appreciate if someone could shed some light on this ;-)
It's a problem with normals. Easy fix is to make Unity recalculate all the normals (In model import settings switch Normals -> Import to Normals -> Calculate).