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1.模型的轴心最好放在模型的最低处中心位置 2.整体位置放到三维软件的世界位置0，0，0点导出 3.建议标准材质都转换成物理材质 4.建议按每层楼塌陷材质减少节点数量，现在节点较多，节点越多，加载越卡 5.按照我们提供的ppt插件导出步骤导出