This special section presents extended versions of two of the best papers from the 23rd ACM Symposium on Virtual Reality Software and Technology (VRST 2017), which took place from November 8 to 10 in Gothenburg, Sweden. ACM VRST in an international forum for the exchange of experience and knowledge for VR/AR researchers, developers, and practitioners. VRST 2017 was sponsored by ACM SIGCHI and ACM SIGGRAPH.