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Cast concrete material with pores and board seams

Build a concrete node material with water stains, aggregate specks from Voronoi cells, darkened and recessed air pores, and optional seams from board formwork every board width. Use it for brutalist architecture, floors, bunkers and urban scenes.

Recorded render of Cast concrete material with pores and board seams

What this component contains

  • ATTRIBUTION.md
  • LICENSE
  • README.md
  • component.json
  • graphcheck.py
  • material_concrete.py
  • meshcheck.py
  • preview.png
  • test_material_concrete.py
  • test_package.py
  • verification/native.json

How it works

Operator
baltor.material_concrete
Parameters
material_name, color, stain_strength, aggregate_scale, aggregate_amount, pore_scale, pore_depth, board_lines and 2 more
Result
One material with a node tree; assigned to the active object.
Blender
4.2 or later
Axes
Blender Z up, -Y forward
Units
metres

Recorded checks

blender 5.2.1 LTS (hash 9e2066aef7ef built 2026-08-25 02:12:34)

  • addon_install_and_enable
  • operator_runs_with_defaults
  • blender_data_matches_core
  • addon_disable_unregisters
  • script_mode_runs
  • clean_reopen_addon_file
  • clean_reopen_script_file
  • gltf_separate_export
  • engine_output_clean

Limits to consider

Pores and aggregate come from Voronoi cells, which are evenly spread rather than graded like real aggregate. Board seams are horizontal only (along object Z) and carry no wood grain imprint. No cracks or spalling. Rendered here with Cycles CPU only. Verified in Blender 5.2.1; written for the 4.2 API.