This topic arose in the following related thread
http://www2.gamecore.ca/forums/index.php?topic=52.msg277#msg277but its really different so to avoid hijacking I created this
Hey IndieWerks
Thanks for this Idea from the above thread
I use an object as a ruler. I have made a box, 1 meter of each side, and use it as a ruler for my project.
I use Milkshape so.
In gamecore I made a box without collisions and made it 1 metre square
In milkshape I made a cube and saved it
I added that cube and moved it next to the box in game core.
I repetitively resized the cube in milkshape and re-added to gamecore until the box and the cube were the same size.
Once I had that I set the grid size in milkshape until 1 grid cell was the same size as the cube.
Now My grid in milkshape is my ruler with 1 metre graduations

PS The grid size turned out to be 1.5 Milkshape = 1.00 GameCore (1 metre) (for me)
Obviously a grid size of 0.15 would therefore = 0.1 (10 cm) in gamecore
Not scientifically accurate but good enough for me