Loading a Scene

The virtual background scene controls are located in the Background tab of the interface. In the Scene panel, click Load to load a new virtual scene. FBX files are presently supported, with partial support for Collada. (Collada file must have correct texture file references to avoid crashes.)

After the file is selected, a dialog box will open to show the progress of the FBX file being loaded.

Loader Log Files

The FBX loader writes out a log file, which can be used to troubleshoot scenes that load incorrectly. The log file is named after the scene being loaded, with a .log extension. The file is located in the /Program Files/Lightcraft/Previzion/Logs directory.

An example of a FBX log file can be seen here.

Default Scene

When the Clear Scene button is clicked, Previzion will load the scene located at /Program Files/Lightcraft/Scenes/PrevizionHome.fbx.

If this scene does not exist, Previzion will load its own internal default 4 panel scene.

Default Light

For scenes that are not using baked textures, and did not include a light, Previzion provides a default light. Click Default Light to enable this.

Horizon Line

Enabling the Horizon Line button creates a virtual horizon line overlay to aid in the alignment of background video plates to foreground live action. The horizontal line represents the virtual vanishing point, so the camera vertical (Y) position must be correct for this to be accurate. For example, if the real camera is 130cm above the ground, the virtual camera Y value should also be 130cm.