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# Using Dynamo to manipulate building data in BIM part 3: Random Parameter Values
- URL: https://havardvasshaug.com/using-dynamo-to-manipulate-building-data-in-bim-part-3-random-parameter-values/
- Published: 2015-03-12T14:56:16.000Z
- Updated: 2026-10-23T20:32:08.000Z
- Author: Håvard Vasshaug
- Tags: Tips, Data, Dynamo, Revit, #Migrated-1792787333365, #wp, #wp-post, #Import 2026-10-23 20:28

A while back I got into a conversation with Daniel Hurtubise at Renzo Piano Building Workshop about possible Dynamo use cases. It turned out we had aligned ideas: Trying out different randomizing techniques with Revit Planting (and other) Families.

Today I recorded a short video demonstrating how you can do this in Dynamo. For the method to work you need parametric planting families. I got mine from [Revit legend Andy Milburn](http://grevity.blogspot.com/?ref=havardvasshaug.com). Read about (and download) my revised families in my blog post [Flat People](https://havardvasshaug.com/flat-people/). Planting Families are a bit weird in Revit, but Andy made them flexible by using Family Nesting and Number Parameters for width and height scaling, in addition to an Angle Parameter for rotation.

[![Random Planting Shadows](https://storage.ghost.io/c/9b/8a/9b8a0d71-390a-45c7-a51f-14ef0f39b305/content/images/2026/10/random-planting-shadows-w-660.png)](https://storage.ghost.io/c/9b/8a/9b8a0d71-390a-45c7-a51f-14ef0f39b305/content/images/2026/10/random-planting-shadows.png?ref=havardvasshaug.com)

This is a generic workflow that can be used on any number of Revit Families and Parameters. For instance, I have randomized facade modules with the same methods previously.

[![Fasademoduler](https://storage.ghost.io/c/9b/8a/9b8a0d71-390a-45c7-a51f-14ef0f39b305/content/images/2026/10/fasademoduler-w-660.png)](https://storage.ghost.io/c/9b/8a/9b8a0d71-390a-45c7-a51f-14ef0f39b305/content/images/2026/10/fasademoduler.png?ref=havardvasshaug.com)