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I have used the object viewer of my surface and selected conceptual visual style. I save the image as a .png file for a presentation. Is it possible to have the area that there is no surface to be black and not white? Other than opening it up in paint?
see attached. Thanks
Object viewer will not display your background.
But, you can use Object viewer to set the view in AutoCAD (or use AutoCAD's 3d Orbit.)
Then,
Be sure you turn on Background in your VisualStyle. Set a background using AutoCAD's Background command.
Use Render to save the png file.