rk_concrete

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. Six built-in cubes wear it: the apron slab (64 x 64 m), the two piers (pier_east, pier_west), the two roofs over them (roof_north, roof_south) and the 145 m long crawlerway strip.

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: 0.46, g: 0.45, b: 0.43, a: 1.0 }: albedo, a light warm grey.
• roughness: 0.92: perceptual roughness.
• metallic: 0.0: dielectric.