Which digital marketing innovation first allowed potential clients to take virtual walkthroughs of architectural designs before construction began?

The architecture industry has evolved significantly in how firms market their services and showcase their designs. Digital marketing has transformed how architectural projects are presented to clients and the public. This trivia question explores a groundbreaking digital marketing innovation that changed how architectural designs are experienced before construction.

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Virtual Reality (VR) immersive experiences introduced commercially around 2014-2015
3D printed miniature models that became industry standard in 2010
Holographic projections first used by major architectural firms in 2018
Augmented Reality (AR) mobile applications that dominated the industry starting in 2008