blender.md needs more details on how to install. Mentioned tutorial doesn't exist.

Installed the blender_addon.py into Blender 4.0.2 on Windows via edit->preferences->Install... No error messages. Log says "Modules Installed () from ..."

However the tool doesn't show up in the sidebar.

You then needed to enable it by selecting "Community" and searching for it by name. There is an easy to miss checkbox next to the title.

docs/source/started/blender.md mentions a tutorial but does not link to where that tutorial is and I can not find it.

The plugin has a version number while Hunyuan3D-2 has no published versions at all. So it is not possible to say what version this issue-ticket refers to.

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the installation documentation also fails to tell to go to https://developer.nvidia.com/cuda-downloads install the CUDA SDK, then go to https://pytorch.org/get-started/locally/ and obtain the pip-command to install the latest torch-version that matches the installed CUDA SDK pip3 install torch torchvision --index-url https://download.pytorch.org/whl/cu132

otherwise you'll see and error "AssertionError: Torch not compiled with CUDA enabled" (included so people searching for that error message get here). That error message would also make a great entry into a regularly updated FAQ document.