Here is an explanation of something I found that may help, but I am still looking on how to make your own front/back face texture. By reading this is seems you can texture your model and way you like and to make sure that your faces are laying right you just switch to the monochrome mode?

In SU (and other 3D surface modelers), every face has a front and a
back. Fronts are meant to be seen; backs are not. Fronts are on the
outsides of objects; backs are on the inside. Rendering applications
render fronts, while backs are invisible or neutral. This system
allows computer resources to be conserved rather than wasted on
rendering faces that will not be seen.


In SU, the default color for fronts is white or cream, and the default
color for backs is light blue or purple. I suppose that on some
systems (yours for example), backs may appear gray. Even after you
paint faces with some color or texture, so that the white or blue is
covered up, the faces are still either fronts or backs. Third party
rendering applications can tell, and they will not render a back even
if it has been painted some color or texture over the default. In SU,
you can see the fronts and backs in their native white or blue even
after they have been painted with a color or texture by using the
Monochrome face display attribute, the last button on the Face Display
toolbar.


When you create a face, SU attempts to guess from its orientation
relative to other faces whether it's a front or a back and to assign
it the correct default color attribute. Sometimes it guesses wrong,
and a face will be reversed. It is considered good form and good
practice to make sure that all faces are turned front side out, even
if you don't plan to use a third party rendering app. When you right-
click a face, the Reverse Faces and Orient Faces commands appear to
allow you to keep all faces right side out.


Orientation of faces and appearance are two separate considerations.
The default white and blue should be used to orient the faces
correctly. The extensive palette of colors in the Material browser
should be used to achieve a pleasing appearance.


Regrettably, you have taken a fancy to the appearance of the back
attribute. Nonetheless, you should right-click one of the white faces
and select the Orient Faces command. That will turn all the blue (or
gray) faces around, so that all the faces are white. This command
doesn't always work perfectly, so you may have to turn some faces
around individually with the Reverse Faces command. If you like gray,
which is entirely your prerogative, you should select a nice gray from
the Material browser and paint the fronts that color. Still, when you
click the Monochrome button, all the exposed faces should be white.


-Gully

 

Here is an easy way for you.
Follow directions from the attached pic. Attached files

 

3DMON, Nice one! thanks I knew I had seen it before...
but I could not remember where.
Thanks for sharing.
Mark