Better Biome Blend Mod (1.19.2, 1.18.2) increases biome color blending radius, and replaces the old blending algorithm by a more efficient one. This mod is Client-Side performance and bug fix. This mod adds support to smooth, large-scale, sRGB accurate biome color transitions. The mod can be installed to adjust the “Biome Blend” setting in your video options, from 0x0 up to 29×29. This setting does not affect performance in any way, other than Vanilla.
Better Biome Blend will use a 29×29 radius for blending. Biomes are now 3D and not 2D. This makes it more difficult to calculate biome colors. Although this required the creation of a more complex algorithm, the mod still runs as fast as 1.17. Better Biome Blend supports water, grass, and leaves in caves. Vanilla does not currently support this.