Set feature line relative to TIN surface in Civil 3D 2026

Civil 3D
1

Hello, I’m trying to create new feature lines from points and set them relative to a TIN surface in Civil 3D using Dynamo. However, I’m not sure how to do this. Has anyone here successfully done it and could share some guidance? If I set setRelative input to true in FeatureLine.SetElevationsFromSurface node, there is Dynamo working in infinite loop.

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2

Hi @Drbohlav,

It works as expected in my setup, maybe you can share your test files? For example:

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4

Thanks. It does seem to work, just very slowly. I’ll log it so we can investigate further about the performance.

If you need a workaround, another approach could be to use the Surface.QuickProfileByObject node to generate all of the intermediate points before you create the feature line.

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