"Index overflow" Issue during Meshing Process on different Machines

[aerialpc]

Hello,

I need to Mesh a Point Cloud (Setting: High) from 364 Images (JPEG from 42mpix Sony) with 309.635.252 points and I always stops after around 6% with the massage "Index Overflow". I tried to process the Mesh in High, Medium, Low and Custom (3.000.000 Polys) on different Machines.

The last try was on a Machine with 2 GPUs and 244GB RAM in "Medium Quality).

I could not find a problem and the RAM schould be enough (max. 50% of the 244 GB RAM have been used).

Where could be the problem? What should I do to mesh this Point Cloud?

Kind Regards,
Thomas

[Alexey Pasumansky]

Hello Thomas,

Usually Index Overflow means that the number of points in the source dense cloud is too much for the current project for the old Arbitrary meshing method (Poisson), so I currently see several options:
- use new (experimental) mesh generation, although it would require depth maps generation again,
- generate the dense cloud in lower quality, then use the old meshing method again,
- disable considerable number of cameras and re-build dense cloud in the same quality and use old meshing method,
- generate the model in blocks then merge them (for example, with the help of the following script: https://github.com/agisoft-llc/photoscan-scripts/blob/master/src/split_in_chunks_dialog.py).
Also you can consider building the Tiled Model instead of the single-block mesh.

[aerialpc]

Thank you vermy much for the feedback and help Alexey!

I currently try to build a Mesh on a Medium Point Cloud.

How can I use/test the new mesh generation?

[Alexey Pasumansky]

Hello Thomas,

To enable the new meshing option you need to check on "Use visibility consistent mesh generation method" in the Advanced Preferences tab, then when selecting Build Mesh -> Arbitrary option in the Workflow menu, you would be asked to select the quality of the depth maps to be generated (meshing is performed directly from the depth maps, reconstructed with Mild filtering option).

The related tutorial contains some examples: http://www.agisoft.com/index.php?id=48

[aerialpc]

I will try this, thank you!