art(huoshan): 压低高档雪花并保留故障底

Co-authored-by: Cursor <cursoragent@cursor.com>

Assets/Materials/M_HuoshanScreenGlitch.mat

@@ -30,20 +30,20 @@ Material:
     m_Ints: []
     m_Floats:
     - _BloomBoost: 0.6
-    - _Chaos: 0.5
-    - _ColorDamage: 1
+    - _Chaos: 0.3
+    - _ColorDamage: 1.45
     - _Emissive: 1.5
     - _Ghost: 0.35
     - _GlitchIntensity: 0
-    - _Grit: 1
+    - _Grit: 0.55
     - _Rage: 0
     - _Scale: 1.6
     - _Speed: 1
     - _SurgeRate: 0.5
     - _Vignette: 0.28
-    - _Warp: 1
+    - _Warp: 1.25
     m_Colors:
     - _Color: {r: 1, g: 1, b: 1, a: 1}
     - _PhosphorColor: {r: 0.44716978, g: 1, b: 0.74689186, a: 1}
-    - _RageColor: {r: 1, g: 0.188, b: 0.302, a: 1}
+    - _RageColor: {r: 0.44716978, g: 1, b: 0.74689186, a: 1}
   m_BuildTextureStacks: []

Assets/Shader/HuoshanScreenGlitch.hlsl

@@ -259,7 +259,7 @@ half4 HuoshanScreenGlitchFrag(Varyings input) : SV_Target
     float2 sampleUV = float2(uv.x + xOff, frac(uv.y + rollPos + vJit));
 
     // ── 采样：荧光化 + 彩色镶边（随损坏加深，撕裂带内额外拉开）。
-    float fringe = (0.0012 + 0.005 * drive + 0.015 * drop)
+    float fringe = (0.0018 + 0.009 * drive + 0.022 * drop)
         * _ColorDamage * (1.0 + bandOn * 1.5);
     half3 col = SamplePhosphorFringed(sampleUV, fringe, tint);
 
@@ -275,7 +275,9 @@ half4 HuoshanScreenGlitchFrag(Varyings input) : SV_Target
     float flash = flashGate
         * smoothstep(0.15, 0.25, cyc)
         * (1.0 - smoothstep(0.40, 0.55, cyc));
-    col *= 1.0 - loss * (1.0 - 0.75 * flash);
+    // 画面不压到全黑：留一层底，撕裂 / 滚屏 / 色度错乱才有东西可作用在上面。
+    // 压死了就只剩雪花，读作"没信号"而不是"信号在坏"。
+    col *= 1.0 - loss * 0.66 * (1.0 - 0.75 * flash);
 
     // ── 撕裂带内亮度错档：带和带之间电平接不上，撕裂在平色区域也看得见。
     col *= 1.0 + bandOn * (hash11(bandId * 7.7 + frameSeed) - 0.4)
@@ -300,10 +302,12 @@ half4 HuoshanScreenGlitchFrag(Varyings input) : SV_Target
     float2 cell = floor(pixelPos / max(1.0, grainPx));
     float snowVal = hash21(cell + frameSeed * float2(11.13, 5.71));
     float rowSnow = step(0.975 - 0.08 * drive, hash21(float2(row, frameSeed + 3.0)));
-    float snowAmt = saturate(
-        saturate(_Grit) * (0.025 + 0.09 * drive + rowSnow * 0.30 * drive)
-        + loss * 0.30
-        + drop * 0.9);
+    // 信号丢失 / 掉台的雪花也走 _Grit——否则高档位时雪花由 loss、drop 独断，
+    // 旋钮拧到 0 都压不下去，屏幕只会糊成一片白。
+    float snowAmt = saturate(saturate(_Grit) * (
+        0.025 + 0.09 * drive + rowSnow * 0.30 * drive
+        + loss * 0.16
+        + drop * 0.55));
     half3 snowCol = snowVal * half3(0.92, 0.97, 1.08)
         * lerp(0.7, 1.05, hash21(cell.yx + frameSeed));
     col = lerp(col, snowCol, snowAmt);