//! GPU compute and rendering actors.
//!
//! - [`sdf`] — Signed Distance Function primitives, operations, transforms,
//! materials, scene composition, and GPU ray march rendering.
//! - [`scene_render`] — Rasterization renderer for mesh-based scenes.
//! - [`font_atlas`] — Shared font atlas utilities (SDF glyph generation).
//! - [`font_load`] — FontLoadActor (loads TTF/OTF from AssetDB).
//! - [`glyph_atlas`] — GlyphAtlasActor (builds SDF glyph atlas).