Sewing pattern envelope (now with bit of texture on back part)

launok

An envelope to use in sewing scenes. 

I have followed a video on how to texture a bag of potato crisps in Sketchup.  I still struggle with the back of envelope to add textures and keep it untextured for now.  I have no idea why the front part texture exports well but back texture do not export.  Guy91600 from Renderosity gave me permission to use his freebie clothing on the images.  Image texture created in Daz Studio & Photoshop.

File uploaded here:

https://sharecg.com/v/93492/browse/5/3D-Model/PATTERN-ENVELOPE-1

EDIT:  Tried again in Sketchup to get back part a bit textured and added some text.  Not easy to get text on. 

I have an image prepared for the back but for some reason the front image have a mirror effect when back image is applied.

https://sharecg.com/v/93499/browse/5/3D-Model/PATTERN-ENVELOPE-1-NEW-BACK-TEXTURE

Laura