0:22 - building a "shell" with the cave kit 用洞穴工具制造洞穴
4:36 - transitions between kits 不同片段间的衔接
8:15 - snap to reference 对齐到对象
9:47 - cave walls & pillars 洞穴墙壁&柱子
12:36 - varying cave topography w/ cliff pieces 改变洞穴内部构造
14:55 - covering holes with pillars & boulders 用东西挡住裂缝
16:23 - dirt mounds & rock piles 土堆&石堆
