Add detail to boxcars with open doors.  Add some crates, boxes, tarp load, or figures to your boxcars that have open doors.  There are even lumber, barrel, or bag loads you can place into an opened boxcar.  You can even add a fake wood flooring to add more detail.

Well here goes, my first (and hopefully not only) attempt to blog my layout, it's progress (or lack), problems etc.
As a youth I first came across Marklin [ ... ]

This is a test of some photos I took with my iPad2. It's all z-scale stuff - code 40 ME unweathered rail with z- and n-scale PCB ties from handlaidtrack.com. [ ... ]

Hopper Weathering Clinic III
By Bill Mock
January 2010

OK, I gave the inside of these hoppers a wash of Engine Black below the coal line. They [ ... ]