- **Transparent Depth Postpass** Indicates whether HDRP adds polygons to the depth buffer that post-processing uses. HDRP performs this operation before the lighting pass. Enabling this feature is useful if you want to use post-processing effects that use depth information, like [motion blur](../../../Post-Processing-Motion-Blur.md) or [depth of field](../../../Post-Processing-Depth-of-Field.md).