Using Mr. Sid Files in Civil 3D

If you have tried to insert a Mr. Sid Image into AutoCAD Civil 3D using the MAPIINSERT command (found on the Insert tab of the ribbon in either of the Geospatial workspaces) you may have found that Mr. Sid images are missing from the list of available image formats. But don’t give up if you need to insert and use that Mr. Sid image, there are two options for you to add this, and several other, image formats into the list.

For the complete tutorial, (and many others) follow this link...
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Using Mr. Sid Files in Civil 3D