if you really need resources from one mod to create another, my guide will help you. 1. Open the archive. 2. Search for the file with the extension.cdae or .dts (.cached.dts).
3. rename it.dts in .cdae.
4. open the model in blender, we will need this plugin to work, install it as usual, the guides are available on the Internet.
5. Import yours .cdae is a model and you are working with it.
6. done
you can also export the model back to cdae/dts/dae and get the material.json.
remember, the use of 3D models for personal purposes is not prohibited, but if you want to publish the material, in order to avoid problems with the law, I recommend obtaining permission from the author of the modification.
Remember, illegal distribution of 3D models leads to legal problems.