The mobility of people's activities, and cloud computing technologies are becoming advanced in the modern age of information and globalization. This study describes the capability of discussing townscape design while sharing a 3-dimensional virtual space with stakeholders in a distributed and synchronized environment. First of all, a townscape design support system based on a cloud computing type VR system is constructed. Next, an experiment of a distributed and synchronized discussion of townscape design is executed with examinees who are specialists in the townscape design field. The conclusions are as follows: 1. Users who use VR frequently and who use videoconferencing consider that the difference with face-to-face discussion is small. 2. The capability of distributed and synchronized discussions in the townscape design field is high.

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Owing to cloud computing Virtual Reality (cloud-VR), a note PC or tablet with no need for a high spec GPU can be used for sharing a 3D virtual space in a synchronous distributed type design meeting. This research investigates the users' eye movements and optimization of the GUI of cloud-VR during a distributed and synchronized VR meeting. Firstly, a townscape design support system based on cloud-VR was constructed. Then, a 30-minute experiment was executed with eight subjects who wore an eye-tracking system. In conclusion, it was effective to use the eye-tracking system because meeting participants could discuss while confirming each other's eye direction in an actual distributed and synchronized VR meeting. In scenes where a reviewer listened to a presenter's explanation, the tendency to look at VR contents other than operation commands was observed. On the other hand, the tendency to look at operation commands about viewpoints, such as "walk-through" and "jump" to an important viewpoint location, was observed in scenes about which a reviewer argued with a presenter.