Update
So after a few experiments I’ve found the the mobile tiling method must be being forced to clamp, even though they are set to wrap. Any reasons for this?
Clamped setting matches the mobile artifact:
In regards to the darker textures on mobile, I’ve had to come to a hacky workaround where I use a Feature Level Switch and set the old shading model to tweak the color with an SCurve node at a power of 0.5 and restore the brightness by multiplying it by 1.5.
Node setup:
