Just a quick question, when you said " I have inserted the vray textures in the presets" what does that actually mean.. The textures for presets like lawns etc. should load automatically and should be set up to do so, when you install V-Ray.. I've not seen this problem myself, in fact the image you have shown, looks almost like a single colour, almost an artificial lawn look, though you do mention you have posted two images so we can see the difference
I suggest you send your scene in as Rokas suggested, they may be able to spot where things are going wrong, but I am a little confused when you say you inserted the textures in the presets.
In Max, with the the problem scene ready to render, just go to Reference > Asset Tracking, refresh the list and see if you have either FOUND or MISSING in the texures for the lawn preset. It should say FOUND and should render correctly.