In the tri-view window, use mouse select the area, select the area,Whatever the shape of curve area, in 3D view always rectangular region.

this is not a bug. Indeed in 3d viewer it will be more convenient to process everything (especially the local 3d viewer) using bounding box instead of arbitrary shape roi.

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V3D official website: http://penglab.janelia.org/proj/v3d/
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* V3D lets you explore & understand your
large 3D/4D/5D images a lot easier!
- fast 3D+ image visualization and analysis,
WYSIWYG, and easy plugin interface:
http://penglab.janelia.org/proj/v3d



Originally posted by Jinzhu Yang: