Update RELEASE.README.md

Resources/RELEASE.README.md

@@ -9,3 +9,14 @@ Other CARLA related command-line options
 
   * `-carla-settings=<ini-file-path>` Load settings from the given INI file. See Example.CarlaSettings.ini.
   * `-world-port=<port-number>` Listen for client connections at <port-number>, write and read ports are set to <port-number>+1 and <port-number>+2 respectively.
+
+To activate semantic segmentation
+---------------------------------
+
+In the config file `CarlaUE4/Saved/Config/LinuxNoEditor/Engine.ini`, add the
+following
+
+```
+[/Script/Engine.RendererSettings]
+r.CustomDepth=3
+```