Then that you have to install this Resource Pack.First You have to Download Realistico Resource Pack.Realistico Resource Pack Installation Guide: This Resource Pack was only updated for the 1.12.2 version by the original developer, Until now there’s not one newer version has came, Whenever the original developer updates it for latest version.But it has some work in progress but it is updated regularly. It has some 3D models, special lighting effects and shading effects and some other features that will make your Minecraft world look more amazing than ever.
It has some smooth transitions effects and realistic shadowing while having the default Minecraft display.
This Resource pack improves your Realistic aspects of your game with some high quality textures.