diff --git a/game/presentation/views/ui_kit.gd b/game/presentation/views/ui_kit.gd
index a4522e3f..2d5151ba 100644
--- a/game/presentation/views/ui_kit.gd
+++ b/game/presentation/views/ui_kit.gd
@@ -262,16 +262,26 @@ static func vignette_rect() -> TextureRect:
 
 
 # 斜光带（demo #v-start .beams——repeating-linear-gradient 102deg，暖白 5% 窄带 240-340/560px；
-# 程序纹理循环带，确定性生成零随机）
+# 程序纹理循环带，确定性生成零随机。迭代 26 T4 光柱硬边修（grilling Q7 裁=连续 alpha）：
+# 带内 alpha 0→0.05→0 横向过渡（旧匀净+零过渡硬边梯形退役）＋纵向衰减上亮下暗；
+# 纹理 filter=显式 LINEAR 白名单（与暗角/地图渐变同血统，见 T2）
 static func beams_rect() -> TextureRect:
 	var img := Image.create(560, 560, false, Image.FORMAT_RGBA8)
 	var ca := cos(0.2094)   # 12°（102deg 带轴的垂直倾角）
 	var sa := sin(0.2094)
+	var beam_col := Color(1.0, 236.0 / 255.0, 200.0 / 255.0)
+	var band_lo := 240.0
+	var band_hi := 340.0
+	var band_mid := (band_lo + band_hi) * 0.5
+	var band_peak := 0.05
+	var band_half := (band_hi - band_lo) * 0.5
 	for y in 560:
+		var v_fall := 1.0 - float(y) / 560.0   # 纵向衰减：上亮下暗（连续 alpha）
 		for x in 560:
 			var d := fposmod(x * ca + y * sa, 560.0)
-			if d >= 240.0 and d < 340.0:
-				img.set_pixel(x, y, Color(1.0, 236.0 / 255.0, 200.0 / 255.0, 0.05))
+			if d >= band_lo and d < band_hi:
+				var a: float = band_peak * (1.0 - absf(d - band_mid) / band_half) * v_fall
+				img.set_pixel(x, y, Color(beam_col.r, beam_col.g, beam_col.b, a))
 	var tr := TextureRect.new()
 	tr.texture = ImageTexture.create_from_image(img)
 	tr.stretch_mode = TextureRect.STRETCH_TILE
diff --git a/game/smoke/smoke_all.gd b/game/smoke/smoke_all.gd
index 7be9fae5..295cf436 100644
--- a/game/smoke/smoke_all.gd
+++ b/game/smoke/smoke_all.gd
@@ -5544,6 +5544,26 @@ func _smoke_texture_filter() -> void:
 	vg.free()
 	var bm = uikit_s.beams_rect()
 	check(bm.texture_filter == CanvasItem.TEXTURE_FILTER_LINEAR, "V3 白名单在位：光柱 beams 显式 LINEAR")
+	# T4 光柱连续 alpha 结构断言（观感归目检）：带心峰值 0.05/带缘连续过渡/纵向衰减上亮下暗
+	var bimg: Image = bm.texture.get_image()
+	var max_a := 0.0
+	var mid_a := 0
+	var top_sum := 0.0
+	var bot_sum := 0.0
+	for y in 560:
+		for x in 560:
+			var pa := bimg.get_pixel(x, y).a
+			max_a = maxf(max_a, pa)
+			if pa > 0.001 and pa < 0.049:
+				mid_a += 1
+			if y < 280:
+				top_sum += pa
+			else:
+				bot_sum += pa
+	check(max_a >= 12.0 / 255.0 and max_a <= 0.05,
+		"T4 光柱带心峰值 α≈0.05（8bit 截断量化下限 12/255，实测 %.5f）" % max_a)
+	check(mid_a > 100, "T4 光柱带内连续 alpha 过渡像素 %d 个（旧零过渡硬边已修）" % mid_a)
+	check(top_sum > bot_sum * 2.0, "T4 光柱纵向衰减生效（上半亮度 %.0f > 下半 %.0f 的 2 倍——上亮下暗）" % [top_sum, bot_sum])
 	bm.free()
 	var gb = uikit_s.gradient_base(Color.BLACK, Color.WHITE)
 	check(gb.texture_filter == CanvasItem.TEXTURE_FILTER_LINEAR, "V3 白名单在位：地图渐变 gradient_base 显式 LINEAR")