Transparency in molecular modeling can be a compelling storytelling tool. If you’ve ever wanted to create eye-catching, dynamic effects to highlight different molecular structures without overwhelming your audience with visual noise, SAMSON’s Pulse animation can be a game-changer.
The Pulse animation offers an elegant way to make nodes (like molecular models or labels) progress from fully transparent to fully opaque and back again, all in a seamless loop. By applying this effect, you can bring focus to specific elements in your visualization or create attention-grabbing animations for presentations or publications. Here’s how to get started with the Pulse animation.
What is the Pulse Animation?
The Pulse animation in SAMSON is designed for nodes with transparency attributes, including structural models, visual models, meshes, and labels. When applied, it progressively alternates between making these elements appear and disappear, creating a smooth cycling effect of transparency.
This type of animation is particularly useful for:
- Highlighting key molecular regions dynamically
- Demonstrating transitions, such as conformational changes
- Building visually engaging scientific presentations
How to Add and Customize the Pulse Animation
Using the Pulse animation is surprisingly simple. Here’s a straightforward guide to adding it to your project:
- Identify the nodes you want to animate. These could be structural models, meshes, or other elements with transparency attributes.
- Open the Animation panel of the Animator.
- Double-click on the Pulse animation effect to apply it to your selected nodes.
Keyframe Breakdown: The Pulse animation divides its effect across five keyframes:
- Keyframes 1–2: Nodes are fully transparent.
- Keyframes 2–3: Transparency gradually decreases, making nodes appear progressively.
- Keyframe 3: Nodes are fully opaque (no transparency).
- Keyframes 3–4: Transparency increases progressively, making the nodes fade out.
- Keyframes 4–5: Nodes return to being fully transparent.
Once applied, you can manually adjust the timing of these keyframes to fit your animation needs. For instance, you might extend the duration of the fade-in phase or shorten the fully opaque phase.
Fine-Tuning with Easing Curves
To make the animation even more polished, you can modify how the transparency effect transitions between keyframes. This is done by adjusting the Easing curve, which controls the speed of interpolation. For example, you could use a smooth curve for a natural fade or create a more dramatic effect with sharp transitions.

Example in Action
Still curious about what the Pulse animation looks like? Here’s a visual example to help you see how it works in practice:

This demonstrates how elements smoothly transition between transparency states, creating a visually engaging effect.
Why It Matters
In the world of molecular modeling, every visualization serves a purpose: whether simplifying complex structures for analysis or emphasizing a particular molecular interaction to tell a compelling story. Dynamic animations like Pulse offer a simple yet effective way to amplify your visuals, making them more intuitive and accessible for your audience.
Learn more about how to use the Pulse animation in the SAMSON documentation at https://documentation.samson-connect.net/users/latest/animations/pulse/.
SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON today at https://www.samson-connect.net.
