3D software

Coming from a career in Aerospace, I can safely say that I know this subject quite well. I've used a program called Unigraphics quite extensively, but it is WAY more than even an above average sign shop would need...not to mention the extreme costs associated with same. The major user of UG is GM. Another major player is CATIA, which is what Boeing and Dodge uses.

Down the scale a bit are programs like SolidWorks, SolidEdge, AutoCAD Mechanical Desktop, etc. These are much more affordable at around $5000. I've used SolidWorks a bit, along with SolidEdge, but am not really proficient with either. Another that I've looked into a bit, but haven't used it at all yet, is called Alibre. This can be had for less than $2000 and looks to be a VERY powerful product with a very acceptable price-tag. They even have a FREE edition. If you went with this one, you'd likely want the Expert package as it will perform the 3D rendering that you are looking for. I've been tempted to buy this just to have as it is quite enticing given the price-per-feature.

Let me know if you have any questions on the subject.

 

There's 3D Studio Max : http://usa.autodesk.com/adsk/servlet/index?id=5659302&siteID=123112

3DS I'm sure is way more then you need.

Scanvec Amiable has a good program called EnRoute: http://www.scanvecamiable.com/EnRoute8482;_FAMILY30.asp

Enroute is used mostly for CNC routing.

Another good one is Rhino 3D: http://www.rhino3d.com/

Rhino is probably more of what you are looking for...

Ther are a few more like Maxon Cinama 4D, Milkshape 3D, Bryce 3D, and so on, But I still think Rhino is what you want.