Extend initial range
A layer’s visibility is defined by its visibility keys. It can appear and disappear multiple times on the same line, depending on these keys.
The image used by a layer at a given time depends on several elements:
- The source type (animated or not)
- The time offset
- The speed multiplier
- Time remapping
The source is the most important element here because it defines a range:
- Some sources have a defined range with a limited duration (image sequence, movie, sub-composition)
- Some sources don't have any range and are temporally infinite (most generators, such as Circle, Constant, Polygon, Noise, Shape, etc)
In all cases, a limited range can be extended by moving the visibility keys further than the last frame.
The block drawn in the dope sheet for each layer can have two different looks:
- The initial range of a source or an infinite range is drawn as a flat surface
- The extended part is represented by diagonal lines.
The way this extension is filled is defined by the Before and After parameters:
- Available in the Reader parameters and described in this section
- Available in the Composition parameters and described in this section