In molecular modeling, effectively presenting molecular dynamics and transformations can make a significant difference in conveying insights. One common challenge is smoothly showing and hiding parts of a molecular system during an animation sequence without resorting to transparency, which may obscure the visualization. This is where the Flash animation in SAMSON comes into play, offering molecular modelers a seamless way to control visibility.
What is the Flash Animation?
The Flash animation in SAMSON allows nodes—elements of your molecular system—to appear at the start of a keyframe and disappear at the end. This is particularly useful for highlighting specific parts of a molecule or pathway in your animation without cluttering the scene with transparency effects. Instead of modifying transparency, the Flash animation directly manipulates the visibility of nodes.
If you’ve ever struggled with maintaining the clarity of your animations while toggling between visible and hidden states, this feature offers a simple and elegant solution.
Adding the Flash Animation
Here’s how you can use Flash to enhance your molecular visualizations:
- Select nodes: Choose the parts of your molecule (nodes) that you wish to hide or show.
- Activate the Flash animation: In the Animator’s Animation panel, double-click on the Flash animation effect. This will add the animation to your project.
The Flash animation contains four keyframes:
- Between keyframes 1 and 2: Nodes are hidden.
- At keyframe 2: Nodes appear and remain visible until keyframe 3.
- At keyframe 3: Nodes become hidden again and remain hidden until keyframe 4.
You can drag and adjust the timing and placement of these keyframes according to your requirements. For granular control, consider customizing the intervals to align with the pacing of your molecular sequence.
Fine-Tuning Visibility with Easing Curves
The Flash animation isn’t just about on/off visibility—it also allows for precision through adjustments of the easing curve. Easing curves define how parameters are interpolated between keyframes. By tailoring this curve, you can control the smoothness or abruptness of the transitions, creating an animation flow that feels natural and engaging.

Why Use Flash?
The Flash animation is ideal for scenarios where clarity is paramount, such as:
- Emphasizing sequential molecular interactions.
- Creating presentations for colleagues or conferences.
- Hiding non-relevant molecular structures temporarily to focus on key components.
Instead of complicating visualizations with transparency effects, Flash maintains scene clarity by simply toggling visibility effectively.
Ready to integrate the Flash animation into your next molecular presentation? Check out the detailed documentation page on Flash here to learn more about its features and applications.
SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON here.
