去除材质-Optimization-Cull Dim Internal Reflections（剔除暗淡的内部反射）选项渲染设置-Optimization-Maximum Trace Depth-反射折射次数拉到最大16Dome Light环境光-Ray-Contribution-Always去除渲染设置-GI-Conserve Reflections Energy（保存反射能量）选项
