Interesting material has appeared on YouTube, showing how much graphic mods can change Minecraft. Were it not for the world divided into cubes; the cult game would be almost unrecognizable.
The video author, hodilton, used four tools. These are Realistic Textures and Continuum 2.1 for lighting and shaders, Terra for more realistic worlds, and Physics Mod for enriching physics.
The first part compares the original textures of different surfaces with their realistic 4K counterparts, and the second shows short gameplay. The author has a computer equipped with an Intel i9-10850K 5.1 GHz processor, Nvidia RTX 3090 graphics card, and 32 GB RAM.
Such a machine did a good job of holding at 30fps, but with realistic lighting turned on, looking at textures up close would cut smoothness down to 12fps.
Links to download all mods are in the description of the video. However, only Terra and Physics Mod are free. The author of Realistic Textures is hodilton himself.