A crowded molecular scene can make a presentation difficult to follow. If every node is visible from the start, viewers may struggle to see which structure matters. But lowering transparency is not always the right fix: transparent objects can still overlap and make the scene harder to read.
The Shown animation offers a different approach. It changes whether selected nodes are visible, rather than changing their transparency. That makes it useful when you want to introduce parts of a molecular model at chosen points in an animation—for example, showing a molecular component only when your explanation turns to it.
Plan the reveal before adding it
First, decide what the viewer should see at each point in the presentation. A simple sequence might begin with the main structure, then bring in another group of nodes when you are ready to discuss its relationship to the first. The goal is not to hide detail for its own sake; it is to make each moment easier to read.
Before applying the effect, select the nodes you want to be shown. Then, in the Animator, double-click Shown in the Animation panel. The animation’s begin keyframe is placed at the current frame. You can move the animation keyframes afterward, so you do not need to get the timing perfect before you add the effect.
Visibility is not a fade
This distinction matters when planning your visual sequence. Shown controls node visibility, not transparency. If your aim is to make an object gradually more transparent, this is not the effect described here. If your aim is to control when nodes are visible in the animation, Shown is the relevant tool.
Thinking in terms of visibility can also help you avoid a common presentation problem: trying to solve visual clutter by making everything faint. Instead, consider whether some nodes can simply be absent from a particular part of the sequence. A focused view can help viewers understand the current point before more context is introduced.
Keep timing easy to revise
After adding the animation, move its keyframes to align the reveal with your explanation. For instance, place the change before the moment you begin discussing the newly visible nodes, giving viewers a clear visual cue that the subject has changed. Play through the sequence and check whether the reveal happens at a useful moment. If it feels early or late, adjust the keyframes rather than rebuilding the animation.
You can also change how parameters are interpolated between frames by modifying the easing curve. Since the documentation does not prescribe one curve for every scene, treat this as a timing choice to review in context. The essential question is whether the visibility change supports the way you want to guide attention.
One interface detail to know
Some older demonstrations show an Animation menu. The current workflow described in the documentation is to access animations through the Animation panel in the Animator. Presentation actions are available through the Animator’s controls.
For a clearer molecular presentation, think of visibility as a way to manage what the audience needs to see at each moment—not as a substitute for transparency. Select the intended nodes, add Shown from the Animation panel, and adjust the keyframes until the reveal fits the story of your model.
Learn more in the Shown animation documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.