How do I machine an imported STL in VCarve Pro: the 3D Rough and 3D Finish workflow?

The workflow

Import: Model > Import Component / 3D Model, then choose the STL or V3M. Set orientation (which face is up), size, and depth in material: how proud of the surface the relief sits, and any base thickness.
Check the composite model in the 3D view, and position it in the 2D view relative to your vectors.
3D Roughing Toolpath: clears bulk material in terraces. Typical starting point: a 1/4" end mill or ballnose, Z Level strategy, and a machining allowance of about 0.02 to 0.03" left for finishing (shop advice, test on scrap).
3D Finishing Toolpath: the surface pass. Use a ballnose (straight or tapered), stepover of 8 to 12% of diameter (the official typical range) for a sandable finish, and a raster angle along the dominant detail direction.
Boundary: set the Machining Limit Boundary to Model Boundary or a selected vector so the toolpaths don't waste time on empty blank (see the finish-boundary entry).
Cutout: a profile toolpath around the model silhouette (Create Vector Boundary makes the vector) with tabs.
Preview everything, then save with your post-processor.

Two finish passes at 90° raster angles can noticeably improve detailed models, at double the time.
If the imported model looks pixelated, the job's Modeling Resolution was probably too low at Job Setup. Restart the job at a higher resolution before investing toolpath time.
Purchased V3M clipart in the software maker's own format imports cleanly and without the third-party-model limit.