So it’s called mip and it’s build in engine feature.
So if you are doing it for performance then there is no point as it’s done already.
You can change this setting in texture asset. If your texture is power of 2 (eg: 4 x 4, 16 x 16, 1024 x 1024, 4096 x 4096) It generates some kind of lod if it’s different eg 1643 x 1024 then you need to scale it. But if it’s this power of 2 then it’s done by engine.