The preliminary solution to this problem is to
a. save the Google image directly from GE into a folder
b. next, attach the image into C3D
c. next drape the image unto the surface.
But there's a catch. If you want to certify that your image and surface are aligned properly and scaled equally, you have to make sure that your coordinate systems for importing Google earth data and attaching external references are the same.
Google Earth by default uses the coordinate system of the image/surface location so no matter what coordinate system you drawing settings are set to in C3D, it will import the image/surface at the locations set in GE.
Equally, external references use the coordinate system set in the drawing settings. So if you mistakenly set the coordinate system to different zone that the location of the imported GE image/surface, you'll find out that there will be an XY scale error when you attach the colored image saved from GE.
I found out that when I manually enter the coordinates of both the Google Earth image/surface and the attached colored GE image there is no alignment offset.
This video illustrates it. The video shows two different drawing settings with two different drawing coordinate systems. Click on link below to see video.
drape_colored_GE
Finally this is a video of the cool 3D view of colored Google image draped over the 3D surface of the site.
draped_colored_image_GE_2
Enjoy!
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