After installation in Blender, you will find the add-on in the "File > Export" menu:
Exported .nif files are fully compatible with tools from the official N64 toolchain such as NIFF Editor:
Data checker checknb2.exe:
Data converter niff2nvf.exe:
You can render exported data using the nvfview rom for instance:
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Install the pypng dependency:
cd <path_to_blender>/2.83/python/bin/ ./python3.7m -m ensurepip ./python3.7m -m pip install --upgrade pip ./python3.7m -m pip install pypng
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Install the latest blend2niff.zip release:
In Blender "Edit > Preferences > Add-ons > Install" select the .zip file.
Click the checkbox to enable the add-on: