[vtkusers] Drawing on a volume

[Robert Golebiowski]

Hi,
I've a volume generated from N images. What I need to do is to allow user to
select one image (or more) from this volume. Good solution would be if I
would be able to highlight a particular image from the volume by drawing a
red line on the edge of a particular image. The problem is I need to draw a
line ("one pixel width") around the volume. In the end I would need to
achieve something similar to vtkBoxWidget, which could be spread around a
part of the volume.
Do you know if VTK offers a convenient way of achieving this ?
Kind regards,
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