Differences

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+===== Pseudo Objects =====
+The TAD interface has a 3D viewing option. When you click the 3D icon on the screen, a window opens and displays your model in perspective view. **Pseudo objects** are used to set the viewing location, angle, and lighting of the model in the 3D viewing window.
+TAD has the following default pseudo objects in TAD:
+  * location (the point from where you view the model)
+  * lookat (the point you are looking, helps set viewing angle)
+  * light
+  * light#2
+The **location** object is represented by a right-angled triangle. It is recommended that you place the location outside the boundaries of the building model.
+The **lookat** object is represented by a right-angled triangle. It is recommended that you place the lookat within the boundaries of the building model.
+**Note**: The location object is different from the architect. The location object is used only for 3D viewing purpose, whereas, the architect is used to execute activities on the site.

Press F1 inside the application to read context-sensitive help directly in the application itself
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