We haven't change our mind on this - 3D series are not supported with RadChart for ASP.NET AJAX. Furthermore we concentrated on a new Silverlight/WPF chart - RadChartView and all our future development efforts will be focused on it.
We are sorry for any convenience this may have caused.
. Have you considered integrating a 3D Silverlight Chart in your asp.net website? It can be achieved easily since the SL Chart is just a plugin. Here's an example
with full source code provided.
All the best,
the Telerik team
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