Common Scale for 3D Objects

By Aaron Dishno Ed.D.


From the last lesson we started to Create a New 3D Building. Now we need to plan how big we want it.

Watch the video on YouTube and / or read about it below. This tutorial is all information about how big to make things (contains no required steps for the ongoing tutorial order). The steps will continue in the next tutorial.


It is not hard to create something that looks right in proportion to itself, for example a door size on a wall, windows, and ceiling height.

But in order to create a 3D Community with proportional 3D Buildings we need to be aware of a Common Scale for measurement.

The program is written to use Units.

1 Unit = 6 inches    or    15.24 centimeters.

With that in mind, a basic wall and door for a one story 3D Building would typically be:

  • Wall Height       = 20 Units  = 10 feet     = 3.048 meters
  • Wall Thickness = 1 Unit       = 6 inches  = 15.24 centimeters
  • Door Width       = 8 Units     = 4 feet       = 1.22 meters
  • Door Height      = 16 Units   = 8 feet       = 2.44 meters
  • Door Thickness = .5 Unit     = 3 inches   = 7.62 centimeters
    (may use .25 Units for small doors)
  • Window Thickness   = .1 Unit
Standard Wall Measurements
Standard Wall Measurements


Scaling 3D Objects

In addition to scaling every 3D Building Block (Wall, Floor, Block, shapes…) to fit a Common Scale, there are scaling settings when you place a:

  • 3D Thing into a 3D Building or 3D Community
  • 3D Building into a 3D Community


Consider that a 3D Thing is a Group of 3D Building Blocks.

When you scale the complete Group, in x,y,z coordinates, a scale of

  • z=1   (left, right when facing north)
  • x=1   (front, back when facing north)
  • y=1   (up, down)

is the original size it was created. This is the Blue Chair in the image below.


3 Scaled Chairs
3 Scaled Chairs


Right Click a 3D Thing to edit the position, rotation, and scaling (and other advanced settings).

The following image demonstrates where to find the Scale Settings and shows the 1:1:1 ratio of the Blue Chair.


Blue Chair - Scale Settings
Blue Chair – Scale Settings


To scale a 3D Thing and keep the ratio in tact, change x, y, and z scaling to the same value.

For example the White Chair is set to 50% of its original size (using .50 or half).

50% Scale-White Chair
50% Scale-White Chair

You can also scale a 3D Thing using nonproportional values.

For example the Yellow Chair is 150% taller (y scale), while Z and X are the original size.

Nonproportional Scale - Yellow Chair
Nonproportional Scale – Yellow Chair

The same Scaling settings exist when you are placing
3D Buildings in a 3D Community.


Next we will Create a 3D Building with 3D Building Blocks


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