This mod is for advanced users who are familiar with using xLODGen, TexGen, & DynDOLOD.

You should use Grass Cache Fixes with this. Be sure to follow the instructions carefully.

I did not test this in-game. Please let me know if there are any issues.

Installation:
ModOrganizer: Install as any other mod. It will complain that "The content of <data> does not look valid", ignore that, and click "Ignore" on the next pop-up as well.

Vortex: No idea, sorry.

Once installed you will then run xLOD, TexGen, and DynDOLOD.

Use Grass Cache Helper NG

Recommended TerrainManager settings:

[TerrainManager]
fBlockLevel0Distance=53248
fBlockLevel1Distance=159744
fBlockMaximumDistance=331776
fSplitDistanceMult=1.000

Refer to the STEP guide for basic instructions

Pay attention to the screenshots on the STEP guide.

This may be helpful: Grass LOD matching colour seam guide

You can find other grass precaches here