Problem opening mesh (.3ds / .wrl) files in ArcGIS

[Paula Lightfoot]

Hi,
I've been using PhotoScan v 1.3 to create georeferenced models from UAV imagery.  I've had no problem opening and working with point clouds and DEMs in ArcGIS v 10.3, but haven't managed to open meshes in ArcGIS.  I've tried exporting in .3ds and .wrl format and using the Import 3D Files tool in the Arc toolbox.  The files are ~1-4 GB each, i.e. a similar size to the point cloud files which I was able to work with in ArcGIS.
I was getting the error message "An attempt was made to reference a token that does not exist" and now I'm just getting the error message "No Valid Files" (even though I'm using the same files as before).
I can create a TIN from a .las dataset in Arc but only for the lowest density point clouds, and it's the high density ones I'm interested in.
Please can anyone give me advice on how to export and open meshes?
Thanks!
Paula

[damianslee]

Is there a ArcGIS Scene Layer Package integrated mesh export?  ArcGIS Earth and PRO support this nicely.