It is possible to set the parameters for our fade effect to 0% for the first image in our layer, then to 100 % for the last.
In this way TVPaint Animation takes charge of calculating the progress of the effect on the intermediate frames.
This is what we refer to as working with Animation keys.
Once this concept is understood, you will no longer work frame by frame.
Proceed in this way for our current project :
* Go onto the first image of the "Palette" animation layer. Set the effect to 0% then click on the button shown opposite.
* A symbol appears in the timeline (see opposite) under the first image.
The name of the Fade effect is written to the left of the timeline.
* The Fade effect is now set to a value of 0% for the first frame of the timeline. At this stage, application of the FX stack has no animation effect. Indeed, the value of this key will be repeated for all frames after this one.
It is necessary to create a second key before applying the FX stack in order to obtain an animation effect.
* Go on the last image of the « house » animation layer, create a key using the button of the FX stack.
You may now immediately set the effect to 100%. In this case it is not necessary to click on the button as before and the key represented by the symbol will be created automatically.
The timeline is modified as below:
* Note that by sliding along the timeline using the [←] and [→] keys of the keyboard or pressing the Play button allows you to view the progress of the chosen effect from the first to the last frame.
To sum up, an animation key is a sort of adjustable time parameter lock which sets the value chosen by the user to a precise point in the timeline.
However, the drawing tool parameters vary dynamically according to the user's direct action on the project and may therefore not be assimilated to animation keys.
On next page, you will see the result that you could obtain on the screen.