diff --git a/crates/gc-engine/src/main.rs b/crates/gc-engine/src/main.rs
index 77aa541..c45d05f 100644
--- a/crates/gc-engine/src/main.rs
+++ b/crates/gc-engine/src/main.rs
@@ -20,6 +20,7 @@ use std::path::PathBuf;
 use anyhow::{Context, Result};
 use bevy::asset::RenderAssetUsages;
 use bevy::image::{ImageAddressMode, ImageFilterMode, ImageSampler, ImageSamplerDescriptor};
+use bevy::material::AlphaMode;
 use bevy::prelude::*;
 use bevy::render::mesh::{Indices, PrimitiveTopology};
 use bevy::render::render_resource::{Extent3d, TextureDimension, TextureFormat};
@@ -308,6 +309,12 @@ fn spawn_level(
             // Double-sided: the strips as stored do not carry a consistent
             // winding, and the game relies on GS defaults rather than culling.
             cull_mode: None,
+            // Blend, not Mask. The disc's alpha is 97.94% opaque, 0.98% clear and
+            // 1.08% partial across 126 values, and Blend handles all three: a
+            // clear texel blends to invisible, a partial one stays smooth. Mask
+            // would flatten those 1.08% to fully opaque, discarding exactly the
+            // soft edges they exist to produce.
+            alpha_mode: AlphaMode::Blend,
             ..default()
         });
         commands.spawn((