How to Assign Z Values to my 2D Polygons?

[SenadHodzic1]

Hi All,

I am trying to take 2D Polygons/CAD Drawings and turn them into 3D Multipatch Models to visualize my town's cityscape.

Currently my process is to Copy the Building Footprint layer from the CAD Polygon feature class and Paste Special into my 'Interim' Polygon Layer. Afterwards, I would add Surface Information and use my town's DTM as the Surface. I also have access to Height attributes provided by the developer. However, whenever I run the Geoprocess to add Surface Information (specifically Z-MIN and Z-MAX), the values for the manually input polygons are all 0, whereas the CAD polygons that were Paste Special'd have accurate Z-Values. 

After which I've tried to use several geoprocesses in 3D Analyst > 3D Features >Conversion or 3D Analyst > 3D Features > Interpolation. The results have varied, but nothing has provided me with a proper value. 

Can I have some assistance in properly figuring out the processes of 2D to 3D? I am not sure if I should be attempting this in a local scene first. I am just at a loss as to what to do.

Kind Regards,

[SenadHodzic1]

Okay so far...I don't like it as a solution, but when I created polygons initially, I moved into a local scene and used Edit Tool "Move" and just "calculated Geometry". This...Isn't ideal personally, but the nature of the project just requires buildings visually so the exact Z value isn't necessary. I might face some issues down the line if I ever require accuracy.