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i have scribed full links TY!!!!!

Lurker is right, ArcGIS is for analysis rather than visualization. For 3d visualization you'll need finer model, light and camera properties to obtain something good out of rendering. Try Autodesk products for native support in all the cad and gis stuffs at one place so that you can have an easy access to standard 3d presentation in software like 3ds Max. You can also try SketchUp which support real time elevation extraction directly from Google map. SketchUp also support importing cad shapes and can render them with engines like Vray (personally I'm not a big fan of Vray, because it has such a confusing file system and always ready to throttle the processor... though fabulous rendering ).

Im ArGIS user for couple years, and I found that 3D in ArcGIS is more analytical than visualization working in 3D visualization, I think better you grab software like City Engine (bought by ESRI now) or anykind of software that pointing on 3d visualization I have a tutorial how to work with Sketchup and ArcGIS Arcscene , but its indonesian language, but I translate it from another English tutorial , I will post it here the links Interoperability between CAD and GIS is a big problem until now, exchange data between those two platform really troublesome, and even the best interoperability software available (I use FME from Safe Software) still far from perfect, IMHO regards,

other links are http://pythonkit.com/Python-Arcgis-pdf.pdf http://freedownloadb.com/pdf/python-arcgis