Every layer on the timeline shares some common controls.
Expanding Layers
Layers on the timeline can be expanded to reveal more details using the arrow icon. Each layer contains sub-groups so that you can quickly find the details you need. Tracks, masks, effects and transform data are all grouped separately.
Some layers will have additional groups. For example, 3D layers include a Material group for adjusting their 3D lighting behavior.
Customizing Settings
A layer’s settings can be adjusted on the timeline or in the Controls panel. The currently selected layer is displayed in the Controls panel. Double-clicking a group or property in the timeline or controls panel will open it in the other area.
Layer Properties
All layers have a layer properties group. The specific options available will vary depending on the type of layer. Common options include:
- Visible: turns the layer’s visibility on and off. You can use a layer as a reference for other layers and effects without it being actually visible in your exports.
- Mute: If the layer contains audio, the Mute option will be displayed. Tick the box to silence all audio contained in the layer.
- Show Waveform: For layers containing audio, enabling this option displays the waveform on the timeline.
- Dimension: switches the layer between 2D and 3D. Embedded composite shots, 3D models and particle simulators also have the 3D unrolled option.
- Alignment: provides various auto-alignment options. Along Motion Path aligns the layer according to its motion (this can be effective if your layer has a define ‘front’, such as an arrow shape). Towards Target Position keeps the layer aligned towards a specified point in space. Towards Layer keeps the layer aligned towards a specified layer.
- Blend: changes how the layer is blended onto layer below.
- Motion Blur: activates motion blur for the layer.
- Parent: links the layer’s transform to another layer. Ordinarily a layer’s transform is relative to the center of the scene. Parenting changes this so that the layer’s transform is relative to the selected pare * Include in Depth Map: includes or excludes the layer when generating the depth map for the composite shot. This is important if the composite shot exists as a 3D Unrolled layer on another timeline.
- Depth Source Layer: for 3D models or 3D effects, this option selects another layer within the composite shot as the source of the depth map. The depth map acts like a mask, and the layer is only rendered where it is nearer to the camera than the information in the depth map.
- Promote Lights: on embedded 3D composite shots containing lights, enabling this option allows the lights to affect 3D layers in the parent composite shot.
Changing Layer Order
Once you’ve created more than one layer you can reorder them be dragging them up and down in the layer list (on the left side of the timeline).
You can select multiple layers to move them at them at the same time by CTRL-clicking or Shift-clicking them.
- Selecting Contiguous Layers: To select multiple contiguous layers, click the first layer, then Shift-Click the last layer. All layers between them will be included in the selection.
- Selecting Non-Contiguous Layers: To select multiple non-contiguous layers, click the first layer, then CTRL-Click each additional layer you wish to add to the selection. Only the layers you click will be selected.
Layer visibility
Any layer can be made visible or invisible at any time using the visibility icon.
Turning a layer invisible does not affect its properties.
Invisible layers will not appear in the viewer and will not be included in any exports.
Note that invisible layers can still be used as source layers for other effects.
Dimension Mode
Layers on the timeline can be set to three states: 2D, 3D plane and 3D unrolled. Which states are available for each layer will depend on the kind of layer it is. 3D Unrolled, for example, is only available for layers which contain 3D content, such as embedded composite shots and 3D models.
- 2D: When set to 2D, the content of the layer works in full 3D (for example, you can orbit a camera around a 3D object), but the rendered result of the layer is a 2D element. Therefore the 3D layer’s interactions with other layers on the timeline is determined solely by its position in the layer stack (Z-depth is not a factor).
- 3D Plane: 3D plane takes the 2D version of the layer and renders it as a 3D plane inside the 3D space. In the case of videos, images and planes this is like having a flat piece of card. With 3D objects and particle simulations it is like looking through a window onto a 3D scene. The 3D plane exists in 3D space, so its interactions are determined by its position in 3D space. In the case of 3D objects and particle simulations note that it is the flat 3D plane which exists in 3D space, not the plane’s contents.
- 3D Unrolled: Renders 3D content directly into the 3D space. Multiple 3D unrolled layers will accurately interact with each other in 3D space. This is the unified 3D space and enables powerful interactions – for example, you can position a green screened actor directly inside the cockpit of a 3D model helicopter, without needing any layering tricks.
Parenting
The menu at the right of the layer list is for parenting layers together. The menu shows a list of all the layers in the current composite shot and you can choose one to be the parent of the selected layer.
When a layer is parented, it takes its transform source from the ‘parent’ layer. If you move the parent layer, the ‘child’ layer also moves.
You can still transform the child layer on top of the transformation already applied from the parent layer. The child is transformed relative to the parent.
An unparented layer uses the centre of the 2D or 3D scene as its origin (0,0,0). A parented layer uses its parent’s transform settings as its origin.