U can try change some settings in your arma 3 profile in X:\Users\*your profile name*\Documents\Arma 3 - Other Profiles\*your profile* in file *your profile name*.Arma3Profile .
You should open it with some text editor, find line with parameters terrainGrid and set value 3.25, after it on high distance you will see all objects, and textures of ground and now-fly rocks. But it works only with single, in multipleer this param locked by server settings.