diff --git a/game/smoke/board_shot_probe.gd b/game/smoke/board_shot_probe.gd
index 06a1084b..3369a1db 100644
--- a/game/smoke/board_shot_probe.gd
+++ b/game/smoke/board_shot_probe.gd
@@ -59,8 +59,12 @@ func _ready() -> void:
 			view.set_world_font(ui_font)
 		add_child(view)
 		view.rebuild(settlement.minesweeper.current_board(), settlement.minesweeper)
-		for i in range(6):
-			await get_tree().process_frame
+		# 抓帧前等入场动画完结（迭代 19 卡① S2 观察项根因修复 2026-10-08）：rebuild 有全板淡入
+		# motion(0.2)+R0 涟漪逐格延迟显形（motion(0.04×离板心距离)+motion(0.12)，最远格 ≈0.56s），
+		# 原制 6 个 process_frame 热机后 ≈0.1s=捕在涟漪中途——逐跑帧时序抖动使揭示 alpha 漂移，
+		# golden L2/L3 跨 2% 容差线波动（实测 0.00-2.53%）。改时间制 1.2s（2×余量）=锚定动画完结态。
+		await get_tree().create_timer(1.2).timeout
+		await get_tree().process_frame
 		await RenderingServer.frame_post_draw
 		var img := get_viewport().get_texture().get_image()
 		if img == null or img.is_empty():
diff --git a/game/tests/golden/board_L2_underdark.png b/game/tests/golden/board_L2_underdark.png
index 60491029..93e1ea64 100644
Binary files a/game/tests/golden/board_L2_underdark.png and b/game/tests/golden/board_L2_underdark.png differ
diff --git a/game/tests/golden/board_L3_deep_underdark.png b/game/tests/golden/board_L3_deep_underdark.png
index 0722f219..f4b25ace 100644
Binary files a/game/tests/golden/board_L3_deep_underdark.png and b/game/tests/golden/board_L3_deep_underdark.png differ