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Neon tube material with a glass sheath

Build a neon sign material: an emissive gas core, whitened at the face-on centre, mixed by the Fresnel term with a clear glass sheath that takes over toward the silhouette. Use it for signs, cyberpunk scenes, bars and stylized lighting.

Recorded render of Neon tube material with a glass sheath

What this component contains

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

How it works

Operator
baltor.material_neon_emission
Parameters
material_name, color, strength, core_whiteness, sheath, assign
Result
One emissive 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

Emission lights the scene only in renderers that treat emissive meshes as lights (Cycles does, with noise); EEVEE needs light probes or extra lamps. No bloom: add glare in the compositor. The white core is a stylized ramp, not a gas discharge spectrum. Rendered here with Cycles CPU only. Verified in Blender 5.2.1; written for the 4.2 API.