Where should I start with a lod system that is adaptive. Unreal lod system just reduces the entire mesh to a lower poly model. But what about for terrain where around you the level of detail is high and in your proximity and as it go’s further beyond a limit , it will start going low poly at different levels. High level around you, low level further away all this on the same mesh ? Is this called Adaptive lod ? Unreal seems it does not have this, quad tree system is one way to do this, anything else besides quad tree as code implementation ?