rk_steel

Material for the launch pad in the fx_launch scene, where the launch_fx Generator runs proc/launch.procGraph, a looping heavy-lift rocket liftoff. 20 entities wear it: the four arm beams and the mast on the tower, the four mount beams (mount_n, mount_s, mount_e, mount_w), the four frame beams and four legs of the table, all built-in cubes, and the three water_tank cylinders (8 m wide, 18 m tall).

Shader: the built-in pbr shader, the engine's standard physically based material: the glTF metallic-roughness workflow lit by the shared pbr_shading model.

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: 0.32, g: 0.33, b: 0.35, a: 1.0 }: albedo, a mid grey.
• roughness: 0.5: perceptual roughness.
• metallic: 0.85: mostly metallic.