/// Scene graph with parent-child hierarchy and layers.
pub use ;
/// Axis-aligned bounding box.
/// Built-in light glyph + influence-volume wireframe emission for scene-graph lights.
/// Per-object material parameters (colour, shading, textures).
/// Participating-media volume primitive (fog, smoke, clouds).
pub use build_light_glyphs;
/// Loose octree spatial index for frustum culling acceleration.
pub
/// Core `ViewportObject` trait and render mode types.