Flags
1. Flags
0 - Randomize the terrain a bit more
1 - Don't create overhangs, only hills
2 - Make the world more flat
3 - Create more hills (overrides 2)
4 - Create big biomes
5 - No Smoothing (Fastest)
6 - More smoothing (Slower)
56 - Even more smoothing (Slow)
65 - Max smoothing (Very very very slow)
7 - Sea level is 128 instead of 64
a - Various snow heights
b - No water caves
c - Create a bedrock labyrinth
2. Detailed Explanations
Note: Click on an image to view it in big.
2.2 Water Caves
Water Caves spawn at sea level and look like this (although you won't find ice in caves anymore)
2.3 Bedrock Labyrinth
To Do: Add chests (and eventually monster spawners)
They spawn from level 0 to 5 and look like this (! turned off by default !):