List of web resources for 3D, VR, and AR

• User Experience (UX)
  • /r/VRUI
  • The User Experience of Virtual Reality

Engine-specific

Unreal Engine 4

• Unreal Engine YouTube Channel, full of tutorials, announcements, and stream recordings
• Unreal forums, and the Unreal VR development forum
• C++ (programming language for Unreal Engine 4)
  • Bucky's C++ tutorials on YouTube
  • Orfeas's C++ tutorials for UE4
• Blueprints Visual Scripting
  • UE4 Blueprint Documentation
• Video tutorials
  • Mitch's VR Lab and his [VR content example assets
  • Pong in VR tutorial project, created by /u/Enter_the_Metaverse
  • Creating a VR Space Combat Sim Without Code in UE4

Unity

• Unity3d Videos on YouTube, featuring many tutorials and panels
• Unity forums, and the Unity VR forum
• Unity tutorial section, has beginner and intermediate tutorials for using the engine.
• Microsoft Developer Network - Unity: Developing Your First Game with Unity and C#
• Unity manual
• C# (programming language for Unity)
  • Unity and C# Video Tutorials by Sebastian Lague
  • Unity tutorials for C#
  • Unity documentation for C#
  • Unity Coding Tips on YouTube
  • Intro to C# programming and Scripting for Game in Unity, a $30 video tutorial series over at Udemy
  • Introductory C# lessons with interactive code
  • A handful of useful C# tutorials at SourceCodester
  • Discussion forum for learning C# at Dream.In.Code

3D Models and Art Assets

3D Models

• TurboSquid 3D modelling community
• Sketchfab 3D modelling community
• Blender, a free and open source 3D modelling program
• OpenGameArt has a trove of mixed-quality 3D models free for use.
• NASA's 3D Resources gallery has a number of public domain, space-themed 3D models. The files are in a few different formats, including .FBX, .3DS, .OBJ, and the less familiar .STL (stereolithography), but converters are easily found across the web.

Texture Mapping

• Normal Map Technical Details at the Polycount Wiki
• Texture Maps Explained: Physically-Based Rendering Workflow

Audio

• Oculus's Introduction to VR Audio
• Audacity a free, simple-yet-powerful audio editor
• For stock audio, check out The Free Sound Project, the Free Bluezone SFX list, the #GameAudioGDC Bundle, and the Oculus Audio Pack

Mobile Development

• Nvidia AndroidWorks provides all the SDKs needed to port a Unity or UE4 application to Android
• Android Studio is Android's all-in-one-suite for developing Android applications, and is useful for debugging and many development tasks. It also fulfills required SDKs.
• Google VR SDK for Unity (works for both Cardboard and Daydream)
• Google Cardboard Developer Overview, and the official Cardboard developer community on Google+
• Google Daydream Developer Overview

Additional VR/AR Platforms

Web VR

• Google web tools
• Mozilla A-Frame
• Google I/O 2016 Livestream- Building High Performance Daydream Apps
• Projects:
  • WorkshopQuest, an online app that teaches core concepts of WebVR dev. From VR.Lab Brussels

Other

• Leap Motion forum, and their development forum
• Leap Motion best practices guide, generally useful for studying user experience