Dcc Substance3d Painter

Substance 3D Painter adapter for the DCC Model Context Protocol (MCP).

It embeds a Streamable HTTP MCP server in Painter and routes host API calls through Painter's Qt main thread. Painter uses an OS-assigned port by default and advertises the endpoint through DCC-MCP discovery.

Install and load

Install into the Python environment Painter uses:

python -m pip install dcc-mcp-substance3d-painter

Point SUBSTANCE_PAINTER_PLUGINS_PATH at the installed package's dcc_mcp_substance3d_painter/painter folder and add the installation root to PYTHONPATH. Painter discovers the packaged startup/dcc_mcp_substance3d_painter_plugin.py entry point and starts the adapter automatically.

Set DCC_MCP_SUBSTANCE3D_PAINTER_PORT before launching Painter only when a fixed port is required; 0 keeps automatic allocation. Standard DCC_MCP_GATEWAY_PORT and DCC_MCP_REGISTRY_DIR settings are also honoured.

Bundled skills

painter-project provides typed tools for a complete material-authoring pass:

• inspect the project and texture sets;
• create PBR fill layers;
• search Painter resources and apply smart materials;
• list export presets, save the .spp, and export textures.

The tools use Painter resource and preset URLs supplied by Painter itself. They do not expose raw JavaScript or arbitrary script execution.

Development

python -m pip install -e ".[dev]"
python -m pytest
ruff check src tests tools
python -m build

Releases use release-please. The release.yml workflow publishes through the pypi environment using PyPI Trusted Publishing.