[OpendTect_Users] Creating a 3D horizon from 2D seafloor picks

[Katable]

Hi there!
We are a postgraduate class using opendTect for the first time to interpret
seismic lines, we have just gotten started on trying to pick the seafloor
before moving on to interpret other horizons in the survey. Unfortunately
we are having trouble creating a 3D seafloor from our 2D picks. The method
we have been trying to use is: in the main window under the 2D horizons
tree: right clicking on a horizon and selecting derive 3D horizon and then
trying to either extend or use other picks to derive a 3D seafloor. At this
point the computers crash and we have to close the programme. Is there a
better way/a way around this problem.
If anyone has any suggestions please let me know.
Thanks,
Geophysics 780 class from Auckland University
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