Custom Feature Matching Node without "feature_files" [question] about meshroom HOT 3 OPEN

What settings do you have in the node?

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Hello. Here is the issue: We are trying to access all of this data through meshroom from an external Python add-on. We are not sure how to access the data from here

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Take a look at this two repository for reference on implementing Python nodes:
https://github.com/PIX3LFLUX/MeshroomDFM --> has good developer documentation
https://github.com/MrClock8163/MeshroomGCPMarkerAdditions --> is probably the right approach for you

Custom Nodes

You can create custom nodes in python and make them available in Meshroom
using the MESHROOM_NODES_PATH environment variable.
Here is an example to launch a Blender rendering from Meshroom.
In a standard precompiled version of Meshroom, you can also directly add
custom nodes in lib/meshroom/nodes. To be recognized by Meshroom,
a custom folder with nodes should be a Python module (an init.py file is needed).

Also there is some work in progress for support of unknown image detector/descriptor types #2252

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