Generating Existing tunnel from point clouds...anyone?

Hi,

we are trying to generate a surface model of some tunnel walls from Point Cloud Data.  I have tried a few methods including Bentley Descartes as described in this youtube video...

Also we have tried exporting the point cloud information to ASCI and importing back in with the intention of generating a mesh.

The Bentley Descartes option seems like it will be too long winded to get the accuracy we need and the ASCI solution is too memory intensive to work and Microstation tends to crash.

Perhaps there is no need to generate a surface model of the tunnel wall...

Im not sure this is the right forum but if anyone can point me in the right direction I'd be very greatful!

Thanks

Abe

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