Working with Water Body Polygons

Water bodies are difficult to model accurately because it is hard to identify and match features due to the uniformity and non-static nature of water. In order to enable PhotoMesh to model and texture a water body successfully, you can define the required water body by drawing or importing a corresponding polygon. PhotoMesh uses this polygon to generate a flat surface over the user-defined water body, and automatically reconstruct any above-water elements – boats, piers, small islands without requiring special user markings. Water bodies can be either of the following:

§  Leveled – A constant water level (i.e., altitude) is set for all points in the water body polygon, to create level water bodies such as seas, lakes, ponds, and pools. This is especially useful for creating a level water body on top of a non-flat terrain or mesh, or for creating a flat water body based on an imported polygon with variable altitude values.

§  Non-Leveled (Sloped) – PhotoMesh segments the water body polygon into multiple flat reconstruction tiles, each of which has a different elevation value based on the average elevation within the specific tile. This option should be selected to create an elevation gradient for water bodies such as rivers, with non-uniform water levels.

Polygon data for both imported polygon layers and manually created ones can be viewed and modified in the Water Polygon list, which can be accessed by clicking the Water Polygons group in the Project Tree. The Water Polygon list has two tabs: Polygons and Layers. The Polygons tab lists all the individual polygons in the project, while the Layers tab lists the polygon layers.