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Changing the perspective of content is useful for when your projector is not pointing directly at a flat surface, but you want your content to look as if it is flat/undistorted when playing back. A common example is projecting an image or video on a frame; using the corners of Perspective Warp, you can quickly adjust your content to fit correctly inside the frame. By pinning the Asset layer's corners to the corresponding corners of the Surface, the perspective of the content is shifted to match the perspective of the frame.
This is also known as corner pinning or the adjustment of the planar perspective of a rectangular piece of content. Corner pinning uses 4 points to construct a new 3D perspective of the content.
As of Lightform Creator 2.0, the Perspective Warp tool has replaced the Structure tool. It is accessible through the toolbar button with the same icon as the old Structure tool. To open projects created by older versions of Lightform Creator, read about the Project Warning Message for Structure Data.
By default, content is not deformed and looks flat. The Perspective Warp tool operates on content. To use it, you must first select an Asset layer.

To automatically change the perspective and corner pin one asset layer in a Surface: