Many Revit users have asked as similar question with regard to how to change the scale of a Revit Fill Pattern.
To explain we’ll use and example of a footing and to add a filled region around a footing to display earth fill.
Once the Filled Region is added you can see that the Fill Pattern scale is too big.
To adjust the scale of a Revit Fill Pattern you need to open the Fill Pattern Dialogue box found at: Manage tab-> Additional Settings -> Fill Patterns. See below.
To scale a Fill Pattern you need to re-import the pattern into Revit with a different scale. So to do this you’ll do the following in the Fill Pattern dialogue box: Click New-> Custom ->Import. See below.
This will take you to a Windows Explorer browser which you then browse to the install directory of Revit which is typically: C:\Program Files\Autodesk\Revit 2015\Data. In this folder you will see then select the Revit.pat file.
Select the Earth fill in the white area.
Now change the name of the fill to say ‘Earth small’ and also change the Import Scale to say 0.25. See below. Then click OK.
You have now created a new smaller scaled Earth Fill Pattern to be used in your Fill Region.
So double click the Fill Region object in your Section or select it and click Edit Type button on the properties box. Change the Fill pattern to Earth Small. See below.
Below is the result of the reduction in scale of the Earth Fill Pattern on the left vs the original on the right.