Thank you for the quick and useful reply, it looks much better now, actually it turns out that despite me averaging the grass normals to a sphere, I was failing to import them in Unreal, I noticed when I tried to average them to just 0,0,1…
Using the grass system like a normal person works too, I was actually painting the grass using the Foliage system…
Now all that’s left is to figure out why my terrain won’t blend.
I did try to increase the contrast, I am using a cheapContrast, set to 0.14, but it doesn’t seem to help.
The contrast just makes the line sharper, which is strange because on the Unreal Documentations wiki pages, on the Height Blend page, they show this beautiful height blended set of textures, like down at “Landscape Layer Blend Types”