Modular UV unwrapping and texturing curved areas So I'm trying to make these modular road tiles (5pcs) and decided to do a quick build to see how well everything fits and to test out some texturing. The end result is trying to become a bit stylized/cartoony feel.

I've now hit a tiny roadblock as the corner pieces are curved and not straight in the uv's. I can't seem to find a way to unwrap the model for the Light grey areas to be straight and use a single texture image for it. 

The straighten uv button (or plugin, can't remember which ones those are) isn't really straightening anything but making the uv islands more crooked and not eliminating the curve completely.  

Do I need to just bite the bullet and make separate textures for all curved areas or is there a way to unwrap the islands straight? 

Any tips are welcome too. First time trying to do anything modular. 

Thanks in advance. 

Using blender 2.79b
Weeell, this isn't my place of expertise, but it'd suggest minding where you place your seams.

and yes, Separating the mesh into bits is also not entirely out of the question

From the looks of things you need to find some way to move the texture about. I suggest finding Darrin Lyle's UV mapping Tutorials on YouTube, they're invaluable for stuff like this. it looks cool too, lemme know when you've gotten around this.