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。
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。
After you have insert RAYTRACE in the reflection map you will see that the material editor is showing new Settings.
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