Level of Detail - LOD

Level of detail (LOD)  

•Level of detail (LOD)  is a technique reduce number of GPU operations that Unity require distant meshes.

•When a GameObject in the Scene is far away from the Camera, you see less detail compared to when the GameObject is close to the Camera.

•By default, Unity uses the same number of triangles to render it at both distances.

•This can result in wasted GPU operations, which can impact performance in your scene.

•The LOD technique allows Unity to reduce the number of triangles it renders for a GameObject based on its distance from the Camera.

•To use it, a GameObject must have a number of meshes with decreasing levels of detail in its geometry.

•The farther a GameObject is from the Camera, the lower-detail LOD level Unity renders.

•This technique reduces the load on the hardware for these distant GameObjects, and can therefore improve rendering performance.

•To use LOD, you must have a GameObject with a LOD group component.

•The LOD Group component provides controls to define how LOD behaves on this GameObject, and references the GameObjects that Unity shows or hides for each LOD level.

prepare different set of LOD , rename it as xxx_LOD0, xxx_LOD1

prepare the set with ration LOD1 -> 0.5, LOD2->0.1 and LOD3->0.05