Grass mod problem - some grasses won't render in Falkreath area.

[RatB0Y68]

I made a grass mod for personal use. I rather like it. I have encountered a small problem though.

In some areas of Falkreath Hold, 2 of my modded grass meshes don't render, but the others remain.

Attached are some screenshots:

 

 

 

In the 1st screenshot, you can see what the grass covers are supposed to look like. There are 2 types of ferns, 2 types of ground clovers & 2 dead grass meshes.

 

In the 2nd screenshot, you can see the fern grasses are missing but the others render fine, the transition isn't smooth or gradual as if by design, there are large patches of Falkreath Hold where the ferns abruptly stop rendering.

 

In the 3rd screenshot, you can see the data in SSEedit for the mod edited grasses. The fern grass meshes are the mod added ones, the clover ground covers are modified vanilla.

In the 4th screenshot, you can see the data in SSEedit for the mod edited landscape textures. Notice how they are identical, both containing the fern meshes (pine forest grasses 3 & 4).


What could cause the 2 meshes to not be present in these specific places? Are they not rendering? Are they not even being generated? This problem doesn't occur with any of my other grasses in any other part of skyrim, even in Haafingar which also uses the same landscape textures.
Any insights would be appreciated. It isn't gamebreaking or anything but it is bothersome to me on a personal level.

[Thallassa]

Unlikely guess but what is iMaxGrassTypesPerTexure set to in skyrim.ini? Since you have 6 grasses in this texture, you would need this value to be at least 6 for all 6 types to show in every area.

[Tkohr]

Both have different landscapes , one is rendered on dirt, the other on grass, thats the reason why not both are rendered on same spot.

[RatB0Y68]

My grass types per texture is 15, I set it that high many years ago when I installed SFO as my first grass mod.

 

Also, I dont understand how ground material type affects which grasses render or why it only affects two of them. How does this work?