When preparing an animation of a molecular system, a close-up can make an important region easier to inspect. But changing the camera view may also shift the point the camera is looking at. That can be distracting, especially when visual effects such as fog or depth of field depend on the camera’s target point.
SAMSON’s Zoom camera animation is useful for this specific problem: it changes the camera’s position between the animation’s start and end frames while leaving its target point unchanged. In practical terms, you can move from a wider view to a closer one without animating a change in the point of interest.
Build the shot from the view you want to preserve
Begin at the frame where the camera move should start. In the Animator’s Track view, select that start frame, then orient the view and camera to establish the composition you want. Think of this as setting the starting shot: decide what should be visible and where the region of interest should sit in the frame before adding the zoom.
Next, double-click Zoom camera in the Animator’s Animation panel. Set the animation’s end frame where you want the zoom to finish. The start and end frames can be moved later, so you can adjust the timing without having to treat the initial placement as permanent.
Here is the animation in action:
Why keeping the target point fixed matters
A camera move can do more than change how large a structure appears. If the camera’s target point changes, the view may also feel as though it is shifting its attention. That may be what you want for a transition between two regions, but it is not always helpful for a straightforward approach toward one feature.
With Zoom camera, the target point stays unchanged. This makes it a useful option when the visual goal is to move closer while keeping the point of attention—and effects tied to it—steady. For example, if you are using fog or depth of field, preserving the target point can help avoid changing the reference point of those effects during the camera animation.
This distinction also helps when choosing between camera animations. Use Zoom camera when you want the target to remain fixed. The Dolly camera animation can use different target points at its start and end frames, so it is better suited when the camera’s point of attention should change as part of the move. The choice is less about which animation is universally better and more about whether the shot should hold its focus or redirect it.
Check the camera settings and timing
By default, camera animations apply to the active camera. The animation’s target point is defined by that camera’s current target position, which is basically the center of the current view. If you need to change which camera the animation applies to, inspect the animation and adjust Apply to active camera.
The way camera positions are defined can also depend on whether the grid is switched on or off. The Keep camera upwards option controls whether the animation’s behavior depends on the grid state. If the camera’s orientation behaves differently than expected, inspect this setting and check the grid state as part of your review.
Finally, the Easing curve controls how camera parameters are interpolated between frames. This affects the progression of the move over time, so preview the animation and adjust the curve if the change in framing feels too abrupt or too gradual. You can also use the animation controllers to adjust camera positions and the target point.
A simple review checklist: confirm the starting composition, verify the active camera, check whether the target should stay fixed, and preview the full move—including its timing and easing. For a focused approach that keeps the camera’s point of interest in place, Zoom camera provides a direct way to make that change.
Read the Zoom camera documentation to learn more about adding and adjusting the animation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.