X3D Anywhere description

demonstrations/AnnapolisUSNA/README.md

@@ -20,11 +20,14 @@ Prior demonstrations of interest:
 was briefed at ACM SIGGRAPH 2021 conference in Cartographic Birds of a Feather (BOF) session on Monday 9 August 2021.  Note that the video was recorded from a Web browser, all models and metadata 
 are following the open international data standard X3D.
 
+X3D Graphics allows modellers to create a Web-based experience, on handhelds or tablets or laptops or big-screen display.  This approach is independent of operating systems and reusable by many application libraries. HTML user interfaces can optionally be added to 3D intefacees
+
 <!-- at
 [![AnnapolisCampusSplash_04_02_2021.png "USNA Annapolis Maryland, 3D Virtual Environment walkthrough preiminary video, 2021"](AnnapolisCampusSplash_04_02_2021.png)](Annapolis_04_02_2021_.mp4) -->
 <!-- https://savage.nps.edu/videos/Spiders3D/Annapolis_04_02_2021_.mp4 -->
-* [Virginia Tech CUBE Walkthrough presentation](VirtuWorlds_NSAA_USNA_Cube_Video_05022022.pptx)
+<!--[Virginia Tech CUBE Walkthrough presentation](VirtuWorlds_NSAA_USNA_Cube_Video_05022022.pptx) -->
 
+Virginia Tech CUBE Walkthrough shows how the same unmodified X3D models can be shown in large-scale virtual environments.
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 | [![VirtuWorlds_NSAA_USNA_Cube_ApproachingBancroftHall.png "VT CAVE immersive video, 2022"](VirtuWorlds_NSAA_USNA_Cube_ApproachingBancroftHall.png)](VirtuWorlds_NSAA_USNA_Cube.mp4) |  [![VirtuWorlds_NSAA_USNA_Cube_BancroftHallEntrance.png "VT CAVE immersive video, 2022"](VirtuWorlds_NSAA_USNA_Cube_BancroftHallEntrance.png)](VirtuWorlds_NSAA_USNA_Cube.mp4) |  [![VirtuWorlds_NSAA_USNA_Cube_PanoramaFromSeawall.png "VT CAVE immersive video, 2022"](VirtuWorlds_NSAA_USNA_Cube_PanoramaFromSeawall.png)](VirtuWorlds_NSAA_USNA_Cube.mp4) |