动态反射优化

To optimize the scene with planar reflections, you can apply the following approach: set up the scene so that only the required planar reflections are rendered, and use less consuming Screen Space Reflections (SSR) for other reflections. An example workflow is as follows:要使用平面反射优化场景，可以应用以下方法：设置场景，以便仅渲染所需的平面反射，并为其他反射使用较少消耗的Screen Space Reflections (SSR)。示例工作流如下：

1. Decide, which bit of the viewport mask would be responsible for reflection of the object.决定视口蒙版的哪一位负责对象的反射。
2. Open the Camera Settings window and enable the selected bit in the Reflection Viewport mask of the camera.

   

   打开“摄像机设置”窗口，并启用摄像机Reflection Viewport掩码中的选定位。

   

3. In the Materials Hierarchy, select the reflective material and enable the same bit in the Planar Reflection Viewport Mask in the Parameters tab of the Material Editor.

   

   在Materials_Hierarchy中，选择反射材质，然后在“材质编辑器”的Parameters选项卡的“平面反射”的Viewport Mask中启用相同的位。

   

4. In the World Hierarchy, select the node to be reflected and go to the Node tab of the Parameters window.在“世界层次结构”中，选择要反射的节点，然后转到Parameters窗口的Node选项卡。
5. In the Surfaces section, enable the selected bit in the Viewport Mask for all surfaces that should be reflected.
   注意

   You can create the special low-poly LOD surface that will be used for reflections only; the viewport mask of such a LOD shouldn't match the camera's viewport mask to exclude it from rendering.You can create the special low-poly LOD surface that will be used for reflections only; the viewport mask of such a LOD shouldn't match the camera's viewport mask to exclude it from rendering.
   You can create the special low-poly LOD surface that will be used for reflections only; the viewport mask of such a LOD shouldn't match the camera's viewport mask to exclude it from rendering.在Surfaces部分中，为所有应反射的表面启用Viewport Mask中的选定位。
   注意

   You can create the special low-poly LOD surface that will be used for reflections only; the viewport mask of such a LOD shouldn't match the camera's viewport mask to exclude it from rendering.您可以创建特殊的低多边形LOD曲面，该曲面仅用于反射。这样的LOD的视口蒙版不应与摄影机的视口蒙版匹配，以将其从渲染中排除。
6. In the Materials Hierarchy, select the material of the node that should be reflected and enable the selected bit in the Viewport Mask in the Common tab of the Materials Editor.

   In the picture below, the reflection viewport mask of the plane has the same matching bit (or bits) with the camera reflection viewport mask and the Viewport masks of the red material ball and its material. The viewport masks of the other material balls don't have a matching bit with the reflection camera viewport mask and/or with the planar reflection viewport mask and, therefore, they aren't reflected:In the picture below, the reflection viewport mask of the plane has the same matching bit (or bits) with the camera reflection viewport mask and the Viewport masks of the red material ball and its material. The viewport masks of the other material balls don't have a matching bit with the reflection camera viewport mask and/or with the planar reflection viewport mask and, therefore, they aren't reflected:

   

   Masked planar reflectionMasked planar reflection
   In the picture below, the reflection viewport mask of the plane has the same matching bit (or bits) with the camera reflection viewport mask and the Viewport masks of the red material ball and its material. The viewport masks of the other material balls don't have a matching bit with the reflection camera viewport mask and/or with the planar reflection viewport mask and, therefore, they aren't reflected:Masked planar reflection在“材料层次结构”中，选择应反映的节点的材料，然后在“材料编辑器”的Common选项卡的Viewport Mask中启用所选位。

   In the picture below, the reflection viewport mask of the plane has the same matching bit (or bits) with the camera reflection viewport mask and the Viewport masks of the red material ball and its material. The viewport masks of the other material balls don't have a matching bit with the reflection camera viewport mask and/or with the planar reflection viewport mask and, therefore, they aren't reflected:在下图中，平面的反射视口蒙版与相机反射视口蒙版和红色实物球及其材料的视口蒙版具有相同的匹配位（或多个位）。 其他材质球的视口罩与反射相机视口罩和/或平面反射视口罩没有匹配的位，因此不会被反射：

   

   Masked planar reflection遮罩的平面反射
7. Enable Screen Space Reflections to produce reflections of other nodes in the scene: on the Menu Bar, toggle the Rendering -> Features -> SSR option on.
   注意

   The SSR effect should be also enabled for the reflective material: go the Post Processing section of the States tab and check if the SSR option is enabled.The SSR effect should be also enabled for the reflective material: go the Post Processing section of the States tab and check if the SSR option is enabled.

   

   Masked planar reflection + SSRMasked planar reflection + SSR
   The SSR effect should be also enabled for the reflective material: go the Post Processing section of the States tab and check if the SSR option is enabled.Masked planar reflection + SSR启用Screen Space Reflections产生场景中其他节点的反射：在菜单栏上，将Rendering -> Features -> SSR选项打开。
   注意

   The SSR effect should be also enabled for the reflective material: go the Post Processing section of the States tab and check if the SSR option is enabled.还应为反射材料启用SSR效果：转到States选项卡的Post Processing部分，并检查是否启用了SSR选项。

   

   Masked planar reflection + SSR遮罩的平面反射+ SSR

Dynamic reflections provided by Environment Probes can be optimized in the same way as described above. To specify the Reflection Viewport mask for the Environment Probe, go to the Environment Probe section of the Parameters window and set the Reflection Viewport Mask parameter in the Baking Settings section.可以按照与上述相同的方式优化Environment Probes提供的动态反射。要为Environment Probe指定Reflection Viewport蒙版，请转到Parameters窗口的Environment Probe部分，然后在Baking Settings部分中设置Reflection Viewport Mask参数。

注意

The Reflection Viewport mask takes effect only when the Dynamic flag is set for the Environment Probe.仅当为Environment Probe设置Dynamic标志时，Reflection Viewport掩码才有效。

In the left picture below, the reflection viewport mask of the Environment Probe matches the camera's Reflection Viewport mask and the Viewport masks of the red material ball and its material. In the right picture, the Reflection Viewport mask of the Environment Probe doesn't match the camera's Reflection Viewport mask:在下面的左图中，Environment Probe的反射视口蒙版与摄影机的Reflection Viewport蒙版以及红色实物球及其材料的Viewport蒙版匹配。在右图中，Environment Probe的Reflection Viewport遮罩与相机的Reflection Viewport遮罩不匹配：

Masked reflection provided by environment probe环境探针提供的蒙版反射

注意

An example of using reflection masks is also available in the Content Optimization video tutorial.视频教程 Content Optimization 中也提供了使用反射蒙版的示例。