Attach Topography to Floor

[awilliams]

Just had a look at your latest graph - you’re close!

Notice that you are feeding a surface into the Surface.ByPatch node that you’re inputting into the Topography.IntersectionWithPlane node. No need for the Surface.ByPatch node as you already have a surface - you need to give the Topography.IntersectionWithPlane node a plane input This thread should help:

Surface plane at parameter

Agreed, and already suggested on the Dynamo GitHub: https://github.com/DynamoDS/Dynamo/issues/6566 In the meantime, simply use Surface.TangentAtVParameter and Surface.TangentAtUParameter to generate planes using the Plane.ByOriginXAxisYAxis method. Its inefficient (thanks to the number of profligate tessellations) but better than nothing: [image] [image]