Magma Conduits by FaceDeer

Removes default mapgen lava and adds widely-spaced vertical lava "veins".

A relatively simple mapgen mod. It adds magma conduits that thread through the ground like a second vertically-oriented cave system.

It also has the following optional features, configurable via settings:

This mod makes magma more sparsely distributed across the map, but where it is found it will be available in massive quantities. Using this mod in conjunction with the dynamic_liquid mod can result in !!fun!! lava flows when caves intersect with magma conduits.