Official Page  -  https://assetstore.unity.com/packages/vfx/shaders/fullscreen-camera-effects/horizon-based-ambient-occlusion-54780  
Official Rating   5 / 80 Votes
Latest Version   3.3
Supported Editor Versions   2018.4.0 or higher
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Available downloads

  • Horizon Based Ambient Occlusion v2.6     March 7, 2020
  • Horizon Based Ambient Occlusion v2.7.1     March 7, 2020
  • Horizon Based Ambient Occlusion v3.2.1     December 30, 2020
  • Horizon Based Ambient Occlusion v3.3     December 30, 2020

  • See also... 

      Shapes FX Pack
      3D Water Effects Pack Vol 1
      FxPro: Bloom&DOF, Mobile-Ready
      Camera Filter Pack
      Definitive Stylized Water