Issue #24778: Location has maxed out textures - Needs a rock to cover the area which transparency can not solve
This apparently is a cell issue and not meshes or placed reference, but one which could be solved by a placed reference in the form of a well placed rock ?
See this post on Skyland Landscape Texture Overhaul discussion https://forums.nexusmods.com/index.php?/topic/5050260-skyland-a-landscape-texture-overhaul/page-60#entry61747642
"To blend cells, both cells must share the same texture. Both of these cells in this area have maxed out their amount of textures they can use and the one needed to blend isn't present in one of them."
So the issue looks like its a simple texture transparency issue, but sadly is not so easily solved :
So similar to covering up placement issues, could use of an appropriate big flat rock / foliage solve the issue ?