Game files

Scripts/Effects/efVideoDistortion.gd

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+extends ColorRect
+
+@export var amount_base := 0.15      # minimum glitch
+@export var amount_amp  := 0.25      # how strong the wave is
+@export var amount_speed := 1.2      # speed of oscillation
+
+var time := 0.0
+@onready var mat := material as ShaderMaterial
+
+func _process(delta: float) -> void:
+	if not mat:
+		return
+
+	time += delta
+
+	# Animate seed (row randomness)
+	mat.set_shader_parameter("seed", time * 10.0)
+
+	# Sine wave for amount
+	var wave := (sin(time * amount_speed) + 1.0) * 0.5
+	var amount := amount_base + wave * amount_amp
+	
+	# random surge
+	if randi() % 120 == 0:
+		amount += 0.3
+		
+	mat.set_shader_parameter("amount", amount)