July 8th, 2013
Making sure your blender objects are the right scale is important if you intend to export them to UDK (or any engine). I've seen the following 2 setups:
Metric : 1 meter per grid square:
scale 50 (a cube of 50 theoretically exports to 1 meter in UDK)
subdivision 10 (metric is all about divisions of 10)
Imperial : 1 foot per grid square:
scale 16 (a cube of 16 theoretically exports to 1 foot in UDK)
subdivision 12 (12 inches per foot)
1. a cube of 16 does not appear to be big enough for a foot. I think 22 is closer.
2. Blender builds its grid and snap-to-grid in multiples of 2. If you want your object to snap nicely inside UDK, it will need to be a multiple of 2. 16 works well & 50 does not.
3. these settings are done in the properties panel for the 3d view. while in the 3d view, press n and go to the "display" section.
I am going to go with a scale of 16 for now. I will see how that plays out over time.