Thank you for your question.
In order to simulate a 3D environment while rotating its items, the RadCarousel performs some calculations which are also based on your preferences. It consists of specifying the Z coordinate of each path point and ZScale value of the specified path. In other words, when you want your items to be scaled down when they are on the rear side (smaller Z) of the Carousel, you will have to specify the scale amount which is to be applied. There is a sample project in our Code Library which implements this behavior:
Take a look at the CarouselPath property of the RadCarousel (and more precisely its ZScale sub-property). This value specifies how the item is scaled according to its position on the path. By adjusting this value you can set a different size of the foremost items in the Carousel. In this way you can also adjust the size of your items, so that they become bigger when they are selected, and smaller when they are not active.
I hope this helps.
All the best,
the Telerik team
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