P46 menu/splash environment FX analysis (LV_P46_SHOT=1)

1) 水面逐格涟漪 — per-column brightness std over the 2x32px water band
   splash ripple frame: col_std=9.620 range=[88.7, 113.6] (required >= 3.0)
   menu lantern-a      : col_std=10.014 range=[60.1, 84.5]
   menu lantern-b      : col_std=10.264 range=[57.9, 82.5]
   menu water row frame diff (a vs b) mean |d| = 31.958

2) 灯笼呼吸光晕 — mean luma in a 88x88 box around bank lantern #1
   lantern box = x[212,300) y[536,624)
   phase a (peak) luma = 59.807
   phase b (trough) luma = 56.025
   luma delta = 3.781 (required >= 1.5)

3) 屋脊上方视差云影 — horizontal shift of the sky band (0..43px)
   measured shift = 39px
   expected per layer (speeds (0.5, 1.0), frames 100->140) = [20, 40]px
   dominant layer = 1 (alpha 30) -> expected 40px

4) 无大黑块 / 不透明校验 (every evidence frame)
   p46-splash-ripple: alpha_min=255 black_px(rgb<6)=0
   p46-cloud-a: alpha_min=255 black_px(rgb<6)=0
   p46-cloud-b: alpha_min=255 black_px(rgb<6)=0
   p46-menu-lantern-a: alpha_min=255 black_px(rgb<6)=0
   p46-menu-lantern-b: alpha_min=255 black_px(rgb<6)=0

verdict = PASS