How do I add 3d polygon to chart via obj file in viewmodel?

Hi Keunyoung,

Thanks for your inquiry.
We have recently published a hotfix for adding 3D Objects to SciChart3DSurface. E.g. ObjectModelSource.Source and ObjectModelSource.StreamSource properties were fixed.
The changes are available in SciChart v7.0.1.27097 and newer. Here is how to get our Nightly builds:
https://support.scichart.com/index.php?/Knowledgebase/Article/View/17232/37/getting-nightly-builds-with-nuget

We also have a custom example demonstrating how 3D objects can be added in XAML and via StreamSource published in our GitHub repository. Here is a link:
https://github.com/ABTSoftware/SciChart.Wpf.Examples/tree/SciChart_v7_Dev/Sandbox/CustomerExamples/AddObjectsToA3DChart

Please try it out and let us know your feedback.

With best regards,
Lex
SciChart Technical Support Engineer