1.8.0.10

My own mods:

Lava

Advanced Terrain Tools

Also tested with no mods

World builder crashes when moving while in the map making process. Happens when painting textures, moving around, sometimes when loading the map. Its always a memory access violation, most of the time its at the end of the memory 0xffffffffffffffff . I'm guessing its something to do with surface materials that have far hide enabled causing an overflow somewhere. I do not have any buildings placed yet, just modified vanilla vegetation. Happens when using all vanilla assets as well as when there is nothing on the map at all. Does not occur when the entire surface is painted something like rock that does not have far hide.

Also tested with no mods and it happens as well.