Which groundbreaking VR technology was first widely adopted by architectural firms around 2015-2016, revolutionizing client presentations?

Virtual reality has transformed how architects present designs to clients and stakeholders. Before investing millions in construction, VR allows clients to experience spaces, make informed decisions, and provide feedback that would be impossible with traditional renderings. This poll tests your knowledge of VR's evolution in architectural practice and its impact on the design process.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Oculus Rift CV1, which allowed clients to 'walk through' photorealistic architectural spaces with 6DOF movement
Google Cardboard, which offered basic 360° panoramic views of architectural renderings
Microsoft HoloLens, which projected holographic building elements onto physical models
Unity 3D Mobile VR, which enabled architects to show clients real-time lighting studies on smartphones