Blending Grass

I've been playing around with unity's grass and I cant figure out how fortnite makes their grass. Do they use some type of blending between the ground texture and the grass texture. When you look at the picture its really integrated

 

Doesn't look like anything special to me. Just make sure the colors are the same or close. Looks like they use a gradient to fake AO, although I watched a GDC talk about the art in that game and I think they have recently started using GI and some advanced stuff like that now.

 

They’re probably 3D models up close, billboards at a middle distance, and normal mapped flat textures at a distance.

 

You can see clearly in the picture it's not 3d models. It's just ordinary 2d grass.

 

I've found that this explains it ithoroughl: https://roystan.net/articles/grass-shader.html