In Voxler 1 and 2, use the following equation to calculate the HeightField Scale:
Scale = (DataMax - DataMin) / (0.5 * sqrt((xMax-xMin)^2 + (yMax-yMin)^2))
To adjust for the offset of the DataMin value, insert a Transform module between the Gridder output and the HeightField input and offset the Z axis by the DataMin value.
Terminology note: DataMax and DataMin are referring to Zmax and Zmin
See attached Excel file for an example of the equation.