In the previous lesson we have applied an Image mask/blend filter to a camera, video and color sources. When a filter is applied to a source and multiple reference copies of that source are present in the project, then filter will automatically be applied to all sources.
So for example if we apply a circle mask to the camera in scene A, but in scene B we want to have the un-masked camera covering the whole preview window, well, this is not possible. The camera source in scene B will also be masked.
So how can we solve this issue? How can we apply a filter to a source, but keep an instance of the source filter-free, or apply another filter to it?
Apply filters to scenes
If we want to keep a source filter-free and also have "copies" of it with different filters (e.g. a native full screen camera source, a round masked camera source, and a cloud masked camera source) we can do that by applying filters to SCENES rather than to the SOURCES. To do that just right click on the scene and select filters.
In this example we will create three scenes:
Full camera scene: including the camera source
Circle masked camera scene: including the camera source
Cloud masked camera scene: including the camera source
At this point the three scenes have different names, but look exactly the same because they all contain the native camera source. We can now proceed as follows:
Leave the Full camera scene as is: this will represent our native camera source
Apply a circle mask filter to the second SCENE
Apply a cloud mask filter to the third SCENE
The fact that we are applying the filter to the scene and not to the source, will not impact the native source.
In any scene within our project where we need the native camera, the circle masked camera, or the cloud masked camera, we will use the corresponding scenes as sources (nested scenes) rather than the native camera source.
This applies to any source type and any filter, not just the masked camera.
Warning: if you have multiple sources in one scene and you apply a filter to the scene, then the filter will be applied to all sources contained in that scene
Create a scene where you include 4 small cameras at the four corners. Top left the full camera, top right the circle masked camera, bottom right the cloud masked camera and bottom left the camera with a mask of your creation. (Tip: you will have to create a scene for each camera type, apply filters to scenes, and use scene as sources in the final scene) In the next lesson you'll learn how to apply a scroll filter
