Geographicraft - Complete World Generation Control
This modification provides advanced settings for landscape generation in Minecraft, allowing you to create unique worlds according to your preferences.
You can reduce the size of climate zones to more manageable scales, which significantly simplifies finding diverse biomes during exploration. Configure transitions between biomes according to your preference - either eliminate sharp contrasts between hot and cold zones, or create a chaotic mixture of all landscape types.
Adjust the frequency of various biomes and climate regions, making common zones more rare or vice versa. Bring back true oceans as in version 1.7, or maintain a unified continent with large lakes instead of seas.
Create worlds of any scale - from giant continents spanning tens of thousands of blocks to small islands that fit on a single map. Configure climate bands to create a world resembling Earth with its latitudinal zones.
Set the initial spawn point in any land area, regardless of its location. Increase the variety of sub-biomes in standard vanilla biomes, adding more variability to familiar landscapes.