A molecular animation can be scientifically clear and still be difficult to follow if the camera shifts unexpectedly. You may have arranged a useful view of a binding site, molecular assembly, or other system, only to find that the framing changes later in the timeline. That makes it harder for viewers to compare what they are seeing from one moment to the next.
The Hold camera animation addresses this presentation problem by keeping the camera parameters fixed between two frames. It is useful when you want the system to remain in a defined view for a portion of an animation, especially when you are not using another camera animation at those frames. The camera view can change while you work on a document, so setting a hold helps preserve the view you intend to present.
Think of the camera as part of the explanation
A stable view is not just a cosmetic choice. If the goal is to show changes in a molecular system, an unplanned change in viewpoint can compete with the information you want people to notice. Holding the camera gives the audience a consistent frame of reference: they can focus on the system rather than work out how the view has shifted.
This is particularly helpful when you want a section of an animation to stay visually quiet. For example, you might want the camera to remain fixed while the viewer studies a particular view of the system. The Hold camera effect does not replace camera movement when movement is part of the presentation; SAMSON also provides a Move camera animation for that purpose.
Set the view, then define the interval
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In the Animator’s Track view, choose the frame where the static view should begin.
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Orient the view or camera as you want it to appear at that point.
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In the Animator’s Animation panel, double-click Hold camera to add the effect.
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Set the animation’s end frame to cover the interval where you want the camera parameters held fixed.
The start and end frames can be moved later, so you do not have to treat the first timing choice as permanent. A practical approach is to decide what the viewer should be looking at, establish that view at the intended start frame, and then set the duration of the hold to match the moment you want to explain.
Use a hold deliberately
Before adding the effect, consider what should stay constant and what should change. If the camera should remain still while the system changes, a hold can help keep attention on the molecular content. If the camera itself needs to travel between views, use a camera movement instead. Keeping those intentions separate can make an animation easier to understand: a stable interval communicates “look here,” while a deliberate camera move communicates “shift your attention.”
Also check the camera at the beginning of the interval before setting its end frame. The hold preserves the parameters from the chosen view, so take a moment to orient the system in a way that makes the important parts visible. You can adjust the animation’s frame boundaries afterward if the static section needs to start earlier or last longer.
In current SAMSON versions, access animations through the Animation panel in the Animator. Older recordings may show an Animation menu that is no longer present; the Animator’s controls are the place to work with the current interface.
For the full instructions, see the Hold camera documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.