diff --git a/docs/tickets.md b/docs/tickets.md
index e227841..cefae79 100644
--- a/docs/tickets.md
+++ b/docs/tickets.md
@@ -689,3 +689,54 @@ symbolized stack; fix then.
 (profiler overlay/history strings are the heaviest string traffic in the
 crashing runs), or an engine-side heap read overrun in a small shared
 helper. Audit report: `shooter/docs/audit-round2.md` finding F1.
+
+## EN-021 — SSR + IBL specular exclusive ownership 🟡
+
+**Why.** Round-2 audit (B): compose is `hdr + ssr` and `fs_main_scene`
+already adds IBL specular into hdr for metals — pixels with an SSR hit
+double-count specular for roughness ≈0.05–0.85, worst for metals at
+r≈0.55–0.75 (in the shooter: alien carapaces / weapon per their glTF
+factors). Dielectrics are largely starved of IBL spec by design and are
+fine; the shooter's custom world materials never call ibl() and are
+unaffected.
+
+**Why not a one-liner.** Scaling `ibl_spec` by the complement of the SSR
+fade must be PAIRED with an env fallback on SSR miss (today miss = black,
+ssgi.rs:1495) or off-screen-reflection pixels lose their specular
+entirely — a worse artifact than the double-count. The fallback needs the
+env cubemap bound into the SSR pass (bind-group layout change).
+
+**Sketch.** (1) Bind env_tex into the SSR march; on miss return
+`sample_env(r, r*max_mip) * fresnel * roughness_fade * strength` instead
+of black. (2) In `fs_main_scene`, scale `ibl_spec` by
+`1 − (1 − smoothstep(0.5, 0.85, r)) * ssr_strength` (the exact
+complement of the SSR shader's own fade). (3) Regenerate goldens; verify
+with the audit's metal-ROI protocol (on-hit vs panned-off luma converge
+<5%).
+
+**Interim calibration option:** `set_ssr_strength(0.25–0.35)` halves the
+overlap engine-wide with zero shader work.
+
+## EN-022 — Motion vectors for material-system draws 🔴
+
+**Why.** Round-2 audit (F8): every material-path draw writes velocity = 0
+(terrain/tree/grass/building — the whole static world plus wind sway),
+so TAA's motion adaptation (`post.rs` motion_alpha ramp) never engages
+for the world: camera translation is covered only by depth reprojection
+and object sway not at all. This is the primary mechanism behind TSR 0.5
+shimmer on thin grass + sway ghosting, and it blocks any future
+motion-blur quality on the world.
+
+**Scope.** Per-draw previous-frame model matrix (the per-draw UBO slot
+already carries the current one; the shadow path already keeps a CPU
+copy in `MaterialDrawCommand.model`), previous view-proj in PerView (the
+core path has it), and a velocity write in the material ABI's OpaqueOut
+path — plus the wind displacement evaluated at previous-frame time in
+foliage vertex shaders so sway produces real motion vectors. Roughly:
+ABI struct + material_system plumbing + 4 world materials + goldens.
+
+**Acceptance.** Strafe at the audit's S7 pose: thin-grass shimmer index
+(frame-diff metric) drops materially; wind sway no longer ghosts;
+`post.rs` motion clamp engages on world pixels (debug: motion_alpha
+visualization).
+
diff --git a/native/shared/src/ffi_core/visual.rs b/native/shared/src/ffi_core/visual.rs
index a2218b8..5018d8c 100644
--- a/native/shared/src/ffi_core/visual.rs
+++ b/native/shared/src/ffi_core/visual.rs
@@ -218,6 +218,14 @@ macro_rules! __bloom_ffi_visual {
         })
         }
 
+        // bloom_set_sharpen_strength  [round-2 audit F8]
+        #[no_mangle]
+        pub extern "C" fn bloom_set_sharpen_strength(strength: f64) {
+            $crate::ffi::guard("bloom_set_sharpen_strength", move || {
+                engine().renderer.set_sharpen_strength(strength as f32);
+        })
+        }
+
         // bloom_set_sun_shafts  [source: macos]
         #[no_mangle]
         pub extern "C" fn bloom_set_sun_shafts(strength: f64, decay: f64, r: f64, g: f64, b: f64) {
diff --git a/native/shared/src/renderer/draw2d.rs b/native/shared/src/renderer/draw2d.rs
index c803936..1ce8850 100644
--- a/native/shared/src/renderer/draw2d.rs
+++ b/native/shared/src/renderer/draw2d.rs
@@ -10,7 +10,7 @@ impl Renderer {
 
     pub fn draw_rect(&mut self, x: f64, y: f64, w: f64, h: f64, r: f64, g: f64, b: f64, a: f64) {
         self.ensure_draw_state(0);
-        let color = Self::color_to_f32(r, g, b, a);
+        let color = Self::color_to_f32_srgb(r, g, b, a);
         let base = self.vertices_2d.len() as u32;
         let (x, y, w, h) = (x as f32, y as f32, w as f32, h as f32);
 
@@ -32,7 +32,7 @@ impl Renderer {
 
     pub fn draw_line(&mut self, x1: f64, y1: f64, x2: f64, y2: f64, thickness: f64, r: f64, g: f64, b: f64, a: f64) {
         self.ensure_draw_state(0);
-        let color = Self::color_to_f32(r, g, b, a);
+        let color = Self::color_to_f32_srgb(r, g, b, a);
         let dx = (x2 - x1) as f32;
         let dy = (y2 - y1) as f32;
         let len = (dx * dx + dy * dy).sqrt();
@@ -53,7 +53,7 @@ impl Renderer {
 
     pub fn draw_circle(&mut self, cx: f64, cy: f64, radius: f64, r: f64, g: f64, b: f64, a: f64) {
         self.ensure_draw_state(0);
-        let color = Self::color_to_f32(r, g, b, a);
+        let color = Self::color_to_f32_srgb(r, g, b, a);
         let segments = 36u32;
         let base = self.vertices_2d.len() as u32;
         let (cx, cy, radius) = (cx as f32, cy as f32, radius as f32);
diff --git a/native/shared/src/renderer/mod.rs b/native/shared/src/renderer/mod.rs
index ad66ec3..bf63ccb 100644
--- a/native/shared/src/renderer/mod.rs
+++ b/native/shared/src/renderer/mod.rs
@@ -656,6 +656,16 @@ struct CachedModelDraw {
 // Renderer
 // ============================================================
 
+/// 0-255 sRGB channel → linear f32. The 2D pass renders into an sRGB
+/// swapchain view whose hardware encode expects LINEAR shader output;
+/// passing the sRGB byte value straight through double-encoded every 2D
+/// color (washed-bright HUD, gamma-skewed AA edges — round-2 audit F5).
+/// Alpha stays linear by definition and is NOT decoded.
+pub(crate) fn srgb_u8_to_linear(c: f64) -> f32 {
+    let c = (c / 255.0).clamp(0.0, 1.0);
+    (if c <= 0.04045 { c / 12.92 } else { ((c + 0.055) / 1.055).powf(2.4) }) as f32
+}
+
 pub struct Renderer {
     pub device: wgpu::Device,
     pub queue: wgpu::Queue,
@@ -7851,6 +7861,14 @@ impl Renderer {
         self.grain_strength = strength.max(0.0);
     }
 
+    /// Composite-pass unsharp mask. Default 0.8; 0 disables the 4 extra
+    /// HDR taps + extra tonemap entirely. Round-2 audit: this was
+    /// hardcoded with no runtime control while visibly haloing
+    /// silhouettes at 4K output (F3/F8).
+    pub fn set_sharpen_strength(&mut self, strength: f32) {
+        self.sharpen_strength = strength.max(0.0);
+    }
+
     /// Sun shaft (screen-space god ray) strength. 0 (default) = off.
     /// 0.4 = subtle haze, 1.0+ = obvious cinematic shafts. The
     /// shafts are sampled from the depth buffer along a screen-space
@@ -9841,14 +9859,24 @@ impl Renderer {
         }
     }
 
+    /// Raw 0-255 → 0-1, no gamma. Used by the 3D immediate batch and
+    /// model tints, whose values feed the linear HDR pipeline directly —
+    /// changing their interpretation would silently re-tint every
+    /// existing drawCube/drawModel call in shipped games.
     fn color_to_f32(r: f64, g: f64, b: f64, a: f64) -> [f32; 4] {
         [(r / 255.0) as f32, (g / 255.0) as f32, (b / 255.0) as f32, (a / 255.0) as f32]
     }
 
+    /// 2D variant: sRGB-decodes rgb so the sRGB swapchain view's hardware
+    /// encode does not double-encode (see `srgb_u8_to_linear`).
+    fn color_to_f32_srgb(r: f64, g: f64, b: f64, a: f64) -> [f32; 4] {
+        [srgb_u8_to_linear(r), srgb_u8_to_linear(g), srgb_u8_to_linear(b), (a / 255.0) as f32]
+    }
+
 
     pub fn draw_triangle(&mut self, x1: f64, y1: f64, x2: f64, y2: f64, x3: f64, y3: f64, r: f64, g: f64, b: f64, a: f64) {
         self.ensure_draw_state(0);
-        let color = Self::color_to_f32(r, g, b, a);
+        let color = Self::color_to_f32_srgb(r, g, b, a);
         let base = self.vertices_2d.len() as u32;
 
         self.vertices_2d.push(Vertex2D { position: [x1 as f32, y1 as f32], uv: [0.0, 0.0], color });
@@ -9860,7 +9888,7 @@ impl Renderer {
 
     pub fn draw_poly(&mut self, cx: f64, cy: f64, sides: f64, radius: f64, rotation: f64, r: f64, g: f64, b: f64, a: f64) {
         self.ensure_draw_state(0);
-        let color = Self::color_to_f32(r, g, b, a);
+        let color = Self::color_to_f32_srgb(r, g, b, a);
         let n = sides as u32;
         if n < 3 { return; }
         let base = self.vertices_2d.len() as u32;
@@ -9905,7 +9933,7 @@ impl Renderer {
     pub fn draw_texture(&mut self, bind_group_idx: u32, x: f64, y: f64, tint_r: f64, tint_g: f64, tint_b: f64, tint_a: f64) {
         let (tw, th) = self.texture_sizes.get(bind_group_idx as usize).copied().unwrap_or((0, 0));
         if tw == 0 { return; }
-        let color = Self::color_to_f32(tint_r, tint_g, tint_b, tint_a);
+        let color = Self::color_to_f32_srgb(tint_r, tint_g, tint_b, tint_a);
         self.draw_textured_quad(x as f32, y as f32, tw as f32, th as f32, 0.0, 0.0, 1.0, 1.0, color, bind_group_idx);
     }
 
@@ -9917,7 +9945,7 @@ impl Renderer {
     ) {
         let (tw, th) = self.texture_sizes.get(bind_group_idx as usize).copied().unwrap_or((0, 0));
         if tw == 0 { return; }
-        let color = Self::color_to_f32(tint_r, tint_g, tint_b, tint_a);
+        let color = Self::color_to_f32_srgb(tint_r, tint_g, tint_b, tint_a);
         let u0 = src_x as f32 / tw as f32;
         let v0 = src_y as f32 / th as f32;
         let u1 = (src_x + src_w) as f32 / tw as f32;
@@ -9934,7 +9962,7 @@ impl Renderer {
     ) {
         let (tw, th) = self.texture_sizes.get(bind_group_idx as usize).copied().unwrap_or((0, 0));
         if tw == 0 { return; }
-        let color = Self::color_to_f32(tint_r, tint_g, tint_b, tint_a);
+        let color = Self::color_to_f32_srgb(tint_r, tint_g, tint_b, tint_a);
         let u0 = src_x as f32 / tw as f32;
         let v0 = src_y as f32 / th as f32;
         let u1 = (src_x + src_w) as f32 / tw as f32;
diff --git a/native/shared/src/renderer/shaders/core.rs b/native/shared/src/renderer/shaders/core.rs
index 2c84307..ecb3407 100644
--- a/native/shared/src/renderer/shaders/core.rs
+++ b/native/shared/src/renderer/shaders/core.rs
@@ -849,18 +849,13 @@ fn fs_main_scene(in: VertexOutputScene) -> SceneOut {
     // (the bright rim glow when the sun is behind a tree). Gated on the
     // alpha-cutoff so only cut-out foliage materials get it; opaque surfaces
     // (cutoff == 0) are unaffected. Matches shade_foliage's transmission term.
+    // Round-2 audit: this block was pasted TWICE (1.7x strength) and ran
+    // unshadowed — a canopy in another tree's shadow still glowed at full
+    // transmission. De-duplicated and multiplied by the sun shadow factor.
     if (alpha_cutoff > 0.0) {
         let trans = pow(max(dot(v, -legacy_dir), 0.0), 3.0) * 0.85;
-        lit += base_color * lighting.light_color.rgb * lighting.light_dir.w * trans;
-    }
-
-    // Foliage backlit transmission — sun bleeding THROUGH alpha-cut leaf cards
-    // (the bright rim glow when the sun is behind a tree). Gated on the
-    // alpha-cutoff so only cut-out foliage materials get it; opaque surfaces
-    // (cutoff == 0) are unaffected. Matches shade_foliage's transmission term.
-    if (alpha_cutoff > 0.0) {
-        let trans = pow(max(dot(v, -legacy_dir), 0.0), 3.0) * 0.85;
-        lit += base_color * lighting.light_color.rgb * lighting.light_dir.w * trans;
+        lit += base_color * lighting.light_color.rgb * lighting.light_dir.w * trans
+             * direct_shadow;
     }
 
     let dir_count = u32(lighting.dir_light_count.x);
diff --git a/native/shared/src/text_renderer.rs b/native/shared/src/text_renderer.rs
index 49b9f34..3affa0a 100644
--- a/native/shared/src/text_renderer.rs
+++ b/native/shared/src/text_renderer.rs
@@ -270,10 +270,13 @@ impl TextRenderer {
             None => return,
         };
 
+        // sRGB-decode to linear like every other 2D vertex color — the
+        // swapchain view's hardware encode expects linear shader output
+        // (see renderer::srgb_u8_to_linear).
         let color = [
-            (r / 255.0) as f32,
-            (g / 255.0) as f32,
-            (b / 255.0) as f32,
+            crate::renderer::srgb_u8_to_linear(r),
+            crate::renderer::srgb_u8_to_linear(g),
+            crate::renderer::srgb_u8_to_linear(b),
             (a / 255.0) as f32,
         ];
 
@@ -419,10 +422,13 @@ impl TextRenderer {
             None => return,
         };
 
+        // sRGB-decode to linear like every other 2D vertex color — the
+        // swapchain view's hardware encode expects linear shader output
+        // (see renderer::srgb_u8_to_linear).
         let color = [
-            (r / 255.0) as f32,
-            (g / 255.0) as f32,
-            (b / 255.0) as f32,
+            crate::renderer::srgb_u8_to_linear(r),
+            crate::renderer::srgb_u8_to_linear(g),
+            crate::renderer::srgb_u8_to_linear(b),
             (a / 255.0) as f32,
         ];
 
diff --git a/native/shared/tests/golden/shapes_2d.png b/native/shared/tests/golden/shapes_2d.png
index 1bb3aee..4ae3215 100644
Binary files a/native/shared/tests/golden/shapes_2d.png and b/native/shared/tests/golden/shapes_2d.png differ
diff --git a/package.json b/package.json
index dfa63c0..0c8994e 100644
--- a/package.json
+++ b/package.json
@@ -1229,6 +1229,13 @@
           ],
           "returns": "void"
         },
+        {
+          "name": "bloom_set_sharpen_strength",
+          "params": [
+            "f64"
+          ],
+          "returns": "void"
+        },
         {
           "name": "bloom_set_sun_shafts",
           "params": [
diff --git a/src/core/index.ts b/src/core/index.ts
index f1be5fe..b11a2b0 100644
--- a/src/core/index.ts
+++ b/src/core/index.ts
@@ -20,6 +20,7 @@ declare function bloom_set_fog(r: number, g: number, b: number, density: number,
 declare function bloom_set_chromatic_aberration(strength: number): void;
 declare function bloom_set_vignette(strength: number, softness: number): void;
 declare function bloom_set_film_grain(strength: number): void;
+declare function bloom_set_sharpen_strength(strength: number): void;
 declare function bloom_set_sun_shafts(strength: number, decay: number, r: number, g: number, b: number): void;
 declare function bloom_set_auto_exposure(on: number): void;
 declare function bloom_set_taa_enabled(on: number): void;
@@ -265,6 +266,15 @@ export function setFilmGrain(strength: number): void {
   bloom_set_film_grain(strength);
 }
 
+/**
+ * Composite unsharp-mask strength. Engine default 0.8; 0 disables the
+ * sharpen taps entirely. At high output resolutions the default visibly
+ * halos high-contrast silhouettes — tune per game.
+ */
+export function setSharpenStrength(strength: number): void {
+  bloom_set_sharpen_strength(strength);
+}
+
 /** Screen-space sun shafts (god rays). strength 0 = off. */
 export function setSunShafts(strength: number, decay: number, r: number, g: number, b: number): void {
   bloom_set_sun_shafts(strength, decay, r, g, b);