Creating Isovists

8. Ray Casting 8.1. Ray Casting : an Introduction to Visibility Studies¶ Ray Casting involves choosing a point in your urban space, from which rays will spread at equal distance from each other. The ray stops when it hits either an obstacle or its set limit. It is the simplest and quickest way to assess visibility, but doesn’t give as much information as isovists or hedgehog. First off, click on Extensions t4su Visibility studies RayCasting. A command box will appear, giving you the follo..