If you want to try this GRASS it works pretty well for me. (I make numerous folders – this one went in Jk Landscape folder.)
When adding it to the Catalog you can adjust Tile Height/ Width and Texture Intensity. Try 30′ for Tile sizes. Try 0.45 for Intensity.
Reducing the intensity sometimes helps with the green grass radiosity or ‘reflection’ that tints walls green.
Just add the attached Grass to your materials folder, then go to Settings > Document Settings (on top) >Terrian and on right Select and assign the Grass. If it is too dark / light or too large / small in appearance, adjust the Tile size and intensity.