GDC, GTC and 3D city planning lead this week’s WebGL stories. CALL FOR SUBMISSIONS: WebGL artists, the call for submissions to the 3D Web Fest is open. Deadline to submit is April 8th (project doesn’t need to be done till late April). Don’t delay; submit today! Stockholm-based Agency9’s Johan Göransson and team just released support for iOS and Android for a streaming WebGL 3DMaps and City Planner