I think you may be able to get around this by using the cubic or flat mapping option as opposed to the parametric mapping option. This allows you to select the side you want display the shader on and may allow you distinguish front from back on a "single" sided object. Other than that you may want to do hide back faces in the assemble room. Or try a uvmapper like lithunwrap, which allows you to do multiple sides, then load reload the uvmapped object into carrera along with the texture. You may need a front and back texture though. I know I have done this before, without too much hassle. I will get out that old project and see what I did. .Painter