Thank you Ivan for the clarifications.
Dip, RadCarousel can show external controls, but the reflection and RadCarousel performance depend on the complexity of the specific control. For more complex controls, there are possible visual issues, for example - the reflection relies on the GetAsBitmap
API function and if the specific hosted control does not support it, the reflection could be missing. The best approach in such situations is to rotate not the actual control, but a screenshot of it, and when the user clicks on the screenshot, you should then show the real document.
Please refer to this RadCarousel Code Library
where we are demonstrating how RadCarousel rotates large images using this approach.
the Telerik team