http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/wip-mods/2524489-wip-realistic-terrain-generation-0-0-18?comment=596

Similar to #290 and #291

👍

MapGenVillageRTG.java:76
WorldChunkManagerRTG cmr = (WorldChunkManagerRTG) worldObj.getWorldChunkManager();

is the problem.

micdoodle8.mods.galacticraft.planets.asteroids.world.gen.WorldChunkManagerAsteroids cannot be cast to rtg.world.biome.WorldChunkManagerRTG
at rtg.world.gen.structure.MapGenVillageRTG.func_75047_a(MapGenVillageRTG.java:76)

Same error.

I gonna check my mod pack when I get home and see if I get any crashes. I also have gc with planets. And also more planets I think. I'll let you know.

Added a temporary fix for this is RTG 0.0.19