op_hull

Material for the outpost under the energy-shield dome in the fx_shield scene (the Outpost entity at (110, 0, 150), the dome's centre). 18 entities wear it, all under Outpost or its habitats: the twelve rounded-box barriers that ring the outpost, the body of each of the three habitats (hab_body), the cargo container cargo2, the central column proj_column and the dish on the mast (mast_dish).

Shader: the built-in pbr shader (@builtin::shaders.pbr), the engine's standard physically based material: the glTF metallic-roughness workflow lit by the shared pbr_shading model. Its glow output is emissive times emissive_intensity (default 1.0) times the emissive texture (default white).

Render state: the defaults (opaque blend, back faces culled, depth write on); mat.yaml sets only the shader and its values.

Properties

• base_color: { r: 0.17, g: 0.19, b: 0.23, a: 1.0 }: albedo, a blue-grey.
• emissive: { r: 0, g: 0, b: 0, a: 1.0 }: black, so it emits nothing.
• roughness: 0.5: perceptual roughness.
• metallic: 0.55: partly metallic.