Use Raster Design to Export an Image with a World File
09/1/2016
Spot On Raster Image Export in Civil 3D
A video from a Jeff Bartel's YouTube channel see the Autodesk Civil Immersion blog.
See the linked blog post above.
Comments
If you employ imagery, this video is a must see.
Jeff does good job of showing how to export out and preserve the insert details here.