When working on complex molecular models, ensuring clear and dynamic visualization is important for communication and analysis. One common user pain—especially during presentations or animations of molecules—is effectively showing and hiding specific model components at key moments. This is where SAMSON’s Flash animation feature becomes a valuable tool to enhance your modeling workflow.
The Flash animation allows molecular modelers to make specific nodes appear and disappear at selected keyframes, addressing scenarios where you need to highlight or isolate specific molecules, residues, or structures during your animation. Let’s explore how you can harness this feature step-by-step.
How the Flash Animation Works
Flash operates by toggling the visibility of nodes rather than their transparency, ensuring clarity in presenting your molecular visualizations. It includes four keyframes:
- Between keyframes 1 and 2, the selected nodes stay hidden.
- At keyframe 2, the nodes become visible and remain so between keyframes 2 and 3.
- At keyframe 3, the nodes are once again hidden and stay invisible between keyframes 3 and 4.
You can adjust these keyframes to control precisely when nodes appear or disappear, ensuring your presentation aligns with your storytelling needs.
How to Add and Use the Flash Animation
Here’s how to implement the Flash animation in SAMSON:
- Identify the nodes you want to show and hide.
- Navigate to the Animation panel in the Animator, and double-click on the Flash animation effect.
- Adjust the keyframes as needed to define the visibility timings of the selected nodes.
Since the visibility changes are defined per keyframe, you can precisely orchestrate how your audience will focus on specific parts of your molecular model. The ability to move keyframes gives you flexibility and ensures smooth transitions in your animations.
Fine-Tuning with Easing Curves
Did you know? You can also modify the animation’s smoothness between keyframes by tweaking its easing curve. This small but powerful adjustment ensures that visibility changes happen in a manner that feels intuitive, whether you want a more abrupt or gradual transition.
With these settings, the scope of your visual storytelling widens, helping you present your molecular designs with impact while avoiding any distractions or visual clutter.
Here’s an example illustrating the Flash animation in action:

Why Flash and When to Use It
The Flash animation is ideal when you want to alternate between focused views in an animation. For instance, imagine highlighting a ligand binding site, then showing the ligand’s movement, and finally returning to a simplified representation of the system. Flash animation streamlines this process without requiring transparency adjustments, making it perfect for clear and precise communication in molecular modeling tasks.
For more details and examples, check out the full documentation here.
SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON from here.
