Adding custom made elements in Revit Architecture

[Anonymous]

Is there any way besides creatng "family" components, other than starting with a "canned" system family component,  to import details into a Revit Project? 

Right now, I'd like to draw something in another app, and plunk it onto a wall in my project file.

I am familiarizing myself with Sketchbook Designer, and would like to draw something there, and drop it as a 2-D into my project.   I have this sinking feeling that I might be SOL.  

Is there any  way to create a component in Sketchbook (or any other ADesk app), and export it as a file that can be brought into Revit as a family component?  If not, how am I supposed to create custom components that are far removed from what's available in system families?  The item I want to create has no similarity to anything available in Revit Families (but maybe it doesn't have to even remotely resemble anything in available system families to be created?).

Thanks

[Alfredo_Medina]

It is possible to insert objects that were created in other programs, such as AutoCAD, 3Dstudio, SketchUp, but they cannot be converted automatically into Revit's parametric families. They will be simply 3d objects with no more features or information. The best advice in the long run is to create the objects with the family editor, if possible.

[Anonymous]

Thanks, Alfredo.  I'll play around with both options.