A molecular animation can be scientifically clear and still be difficult to follow if the camera changes unexpectedly. When the view shifts between frames, viewers may have to spend their attention reorienting themselves instead of noticing the structural change you want to show. This is especially frustrating when you want a stable view across a section of a presentation, but the document’s view may change as you work.
In SAMSON, the Hold camera animation addresses this by keeping the camera parameters fixed between two frames. It is useful when you are not using another camera animation at those frames and want the system to remain in a defined view. The molecular system can be presented without an unintended change of viewpoint distracting from the sequence.
Set the view before you add the hold
Start by choosing the frame where the stable view should begin in the Animator’s Track view. Then orient the view and camera as you want the system to appear. Take a moment to check that the important parts of the model are visible and that the view is suitable for the segment you are preparing.
With the start frame selected and the view set, open the Animator’s Animation panel and double-click Hold camera. Set the animation’s end frame to cover the interval where you want the camera parameters held fixed. You can move the start and end frames later if the timing needs adjustment.
Think of it as a presentation boundary
A practical way to plan the hold is to ask: “Where should this view begin, and when should it stop being the view I want?” For example, if a sequence contains a stretch where you want the audience to inspect the system from one angle, use the start frame to establish that angle and the end frame to define the span. This gives the segment a consistent visual reference without requiring you to repeatedly reset the view while working.
It can also help to review the animation around both boundaries. At the start, confirm that the intended view is in place. At the end, check that the hold covers the full interval you meant to stabilize. If the segment changes as your presentation develops, adjust the frame range rather than rebuilding the whole animation.
Hold camera is for keeping a view steady, not for moving the camera. If your goal is to deliberately change the viewpoint over time, see the Move camera animation instead. Choosing between a held view and an intentional camera movement helps make the visual purpose of each section clearer.
The animation can be added through the Animator’s Animation panel. Some older instructional material may show an Animation menu; the current documentation notes that animations are accessed from the Animation panel, while presentation actions are available through the Animator’s controls.
For the steps and current interface details, see the Hold camera documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.