Limb darkening for the sun

crates/resolved-cli/src/main.rs

@@ -46,7 +46,8 @@ struct RenderArgs {
     #[arg(long)]
     preview: Option<PathBuf>,
     /// Lighting fidelity tier: L0, or L1 (adds Earth's surface, shadows on targets,
-    /// light from Earth and the Moon, and eclipses on them; needs Blue Marble data).
+    /// light from Earth and the Moon, eclipses on them, and the Sun's limb darkening;
+    /// needs Blue Marble data).
     #[arg(long, default_value = "L0")]
     lighting: LightingTier,
     /// Camera fidelity tier: C0.