Editing One Point Perspective in SketchUp (section)

=== Bugs and workarounds ===

<p class="alert alert-warning">Note that the ACT camera is extremely buggy under Mac OS & SketchUp 2017. For example, even a "locked" camera can be moved using the orbit tool in some cases. The behavior so far is so arbitrary that it's been difficult to document the inconsistencies. Basically, be very careful when manipulating a camera. Take pains to make sure that it's not selected before using the orbit tool. Save a copy of the project to insure the camera angle is preserved somewhere where it can be retrieved.</p>

Aiming the camera can be achieved with the arrow keys along with modifier keys. The instructions are displayed in the status bar at the bottom left of the project window. These controls do not work reliably on Mac OS. They work much better on Windows. <ref>[https://help.sketchup.com/en/article/1220896 Moving and Aiming an ACT Camera], SketchUp Knowledgebase</ref>

After adjusting the position of an ACT camera with the Move tool, it tends to aim off in some random direction. The camera can be positioned such that it is pointing directly at an object, and the fustrum will indicate that the object is the target of the camera, but after switching to view through the camera, the target will be off to the right of the object instead.

To fix this, while viewing through the camera, right click on the scene and select '''Edit Camera'''. Change the focal length value. The target will now be aligned correctly with the position of the camera. Now edit the camera again and enter the correct focal length value. ''(Haven't confirmed that this works on Mac OS.)''