Custom Overworld made by Scheballs and Amichama using World Painter. Contains Custom Biomes from Biomes O Plenty and Thaumcraft.
Here is a small album showing off some of the biomes.
http://imgur.com/a/Nzumw

3D Overview : https://www.dropbox.com/s/fdh3rw20zv82m5d/hamcraft_1.7_v7_3d.png?dl=0
Surface Map : https://www.dropbox.com/s/uoju8rgj4o1h0lu/hamcraft_1.7_v7_Surface.png?dl=0
Biome Map : https://www.dropbox.com/s/b5xhk937r0i9dw2/hamcraft_1.7_v7_Biomes.png?dl=0

EDIT1* Explored more of the map and this made Minecraft use the mods and populate the chunks with trees and other goodies. I explored a lot of the map but there is still more to come.