Revit preview not displayed

Hello! I can only see some grids/shape of the model but not the real model in the revit view. How can I solve it? It is fine in the dynamo view. As shown in the pic. Please help. Thank you!

It is because the geometry you are creating is only “Dynamo” geometry and you have not translated that back into “Revit” geometry or families. The blue lines you see in Revit are the previews of nodes that create lines and points.

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Thank you so much! These are the nodes I am using. But at which stage should I link them with modelcurve.bycurve?

another half of it… can’t upload two images in one