You can create any Geometry in SciChart 3D using our BaseSceneEntity API.
Let me know if this helps,
The CubeGeometry.cs file in the above example renders a cube with 6 planes and the line outline.
If you modify this to render a single plane then you can see how to add a plane to the SciChart3DSurface.
The only thing necessary is to note that the locations passed to CubeGeometry are ‘World Coordinates’ not data coordinates. E.g. if your axis is 0-10 but the world is 1000x1000x1000 then the geometry is in the world space not data. You can read how to convert between the two coordinate systems over here:
This might account for the offset you are seeing.
Finally, at the moment there is no 3D Annotations feature however this is requested on our feature-request portal. Please vote for the feature here:
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