Important: Raytrace map and Raytrace material use a surface's normal to decide whether a ray is entering or exiting a surface.
重要的：光线追踪贴图和光线追踪材质使用表面法线来决定一束光线是否进入或脱离表面。
After you have insert RAYTRACE in the reflection map you will see that the material editor is showing new Settings.
当你为反射贴图通道添加了光线追踪贴图后，你会发现材质编辑器显示出新的设置。
Go to maps and assign to the REFLECTION map "RAYTRACE".
在贴图卷展览为反射贴图通道赋予一张“光线追踪”贴图。
Go to maps and assign to the REFLECTION map "RAYTRACE".
在贴图卷展览为反射贴图通道赋予一张“光线追踪”贴图。
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