Creating insightful molecular visualizations often means finding ways to highlight dynamic behaviors or structural emphasis. For molecular modelers, one common challenge is effectively presenting how certain parts of a molecule interact dynamically while managing visual clutter. If you’ve faced this issue, the Pulse animation available in SAMSON might be the solution you’ve been looking for.
What is the Pulse Animation?
The Pulse animation in SAMSON offers an elegant way to make molecular nodes (like structural models, visual models, meshes, or labels) progressively appear and disappear. This can be especially useful for showcasing intricate molecular relationships or dynamics in a clear and visually engaging manner.
The nodes involved must have a transparency attribute for the Pulse animation to work effectively. Imagine using this to highlight key residues in a protein, simulate interactions, or draw attention to specific labeling elements in your molecular scene.
How Does It Work?
Applying the Pulse animation is straightforward:
- Select the nodes you want to highlight using the Pulse effect.
- Double-click on the Pulse animation effect in the Animation panel of the Animator within SAMSON.
The animation consists of five keyframes, giving you full control over how your nodes transition in opacity:
- Keyframes 1 to 2: Nodes start fully transparent and remain invisible.
- Keyframes 2 to 3: Nodes progressively appear, becoming increasingly visible as transparency decreases.
- Keyframe 3: Nodes are fully opaque (completely visible).
- Keyframes 3 to 4: Nodes progressively disappear as transparency increases again.
- Keyframes 4 to 5: Nodes return to being fully transparent.
Each of these keyframes can be moved and adjusted according to the desired timing or effect in your molecular animation, ensuring a custom-tailored visualization experience.
Advanced Adjustments
To further refine the animation, you can customize how parameters are interpolated between frames by modifying the Easing curve. This adjustment gives you granular control over how smooth or dynamic the transitions appear, providing flexibility to suit specific presentation needs.
For example, in cases where you might want nodes to accelerate into visibility, easing curves can provide exactly the effect you’re after.

Why Use the Pulse Animation?
Molecular modeling isn’t just about building structures—it’s also about communicating complex ideas clearly. The Pulse animation can:
- Directly draw attention to specific molecular features.
- Showcase dynamic interactions within a molecule.
- Add visual clarity to presentations or reports by controlling emphasis.
Whether you are presenting your work in a professional setting, preparing educational materials, or exploring molecular dynamics for your own research, the Pulse animation offers a flexible and visually appealing way to enrich your visual storytelling.
To dive deeper into the details of the Pulse animation and learn its full potential, visit this documentation page.
SAMSON and all SAMSON Extensions are free for non-commercial use. Download SAMSON today at SAMSON Connect.
