Hey, I had a similar problem. do you have ANY grass mods later in your load order? Even if they don't overwrite cathedral landscape's FILES, if they have a iMinGrassSize= ini tweak, it may overwrite cathedral landscapes INI TWEAK. Personally, I had 3D pine grass that had an ini tweak (iMinGrassSize=20), when I adjusted that, I could clearly see a difference in the cathedral landscapes grass density. I hope this helps my fellow modder