LandMassplugin

hello everyone ive started using landmass plugin in UE 4.25 but i get a different result to this video 4.24 Feature Highlights and Landscape Tools | Live from HQ | Inside Unreal - YouTube and my landscape is kinda low poly and doesnt have enough details like the version in video
i wanted to is there a way to achieve the same result should i increase render target texture resolution? or its related to my GPU power and i should fix them manually using normal sculpt tools?