The only way I know of is to use as many billboards as you have images or videos and have only one of them visible at the time.
Visibility can be animated, so that is how you can switch between planes. The Visibility button toggles between visible and not visible.
76% of original size (was 662x19) - Click to enlarge![https://forum.reallusion.com/uploads/images/1d98fa64-5de2-4af4-b8ef-3cab.png](https://forum.reallusion.com/uploads/images/1d98fa64-5de2-4af4-b8ef-3cab.png)
At the first frame, you would have the first plane visible and all others not visible. Then, at the point in time where you want to switch images, you would set the first plane to not visible and the plane with the desired image to visible, and so on for the other images.
In the timeline there is a 'Visible" track where you can make further adjustments:
76% of original size (was 662x19) - Click to enlarge![https://forum.reallusion.com/uploads/images/398dd261-8df8-488f-87c3-83ac.png](https://forum.reallusion.com/uploads/images/398dd261-8df8-488f-87c3-83ac.png)
Make sure that all planes or billboards are at the same position, so that it looks as if just the images change.
It's easy to align the planes or billboards, see the image below (this is iClone 8, but it works the same in iClone 7):
76% of original size (was 662x19) - Click to enlarge![https://forum.reallusion.com/uploads/images/fe45a912-494c-464d-ac8d-c5bb.png](https://forum.reallusion.com/uploads/images/fe45a912-494c-464d-ac8d-c5bb.png)
It's easier to do than explain...:unsure: