Standard better snow, adds a snow layer to some non-full blocks like fences, a lot of plant-like blocks, etc.
Better snow with the Default extension built-in resource pack.
Requires ModMenu to be accessed.
Better grass with Nether Update
It's literally pack.png
Better grass with Fancy settings, side textures are smoothen.
Lush Caves with better "snow" and the LambdaBetterGrass Default extension resource pack. Credits to cavebiomes by SuperCoder79 for the lush caves generation.