diff --git a/addons/ShaderLib/Artistic/Adjustment/Contrast.gd b/addons/ShaderLib/Artistic/Adjustment/Contrast.gd
index 53a59ef..3cbdd34 100644
--- a/addons/ShaderLib/Artistic/Adjustment/Contrast.gd
+++ b/addons/ShaderLib/Artistic/Adjustment/Contrast.gd
@@ -35,7 +35,7 @@ func _get_input_port_default_value(port: int) -> Variant:
 		1:
 			return 1.0
 		_:
-			return null
+			return Vector3(1.0, 1.0, 1.0)
 
 func _get_output_port_count() -> int:
 	return 1
diff --git a/addons/ShaderLib/Artistic/Adjustment/Hue.gd b/addons/ShaderLib/Artistic/Adjustment/Hue.gd
index 6331310..9f29fd5 100644
--- a/addons/ShaderLib/Artistic/Adjustment/Hue.gd
+++ b/addons/ShaderLib/Artistic/Adjustment/Hue.gd
@@ -35,7 +35,7 @@ func _get_input_port_default_value(port: int) -> Variant:
 		1:
 			return 0.0
 		_:
-			return null
+			return Vector3(1.0, 1.0, 1.0)
 
 func _get_output_port_count() -> int:
 	return 1
diff --git a/addons/ShaderLib/Artistic/Adjustment/ReplaceColor.gd b/addons/ShaderLib/Artistic/Adjustment/ReplaceColor.gd
index 1f6eace..8a64cd8 100644
--- a/addons/ShaderLib/Artistic/Adjustment/ReplaceColor.gd
+++ b/addons/ShaderLib/Artistic/Adjustment/ReplaceColor.gd
@@ -43,7 +43,7 @@ func _get_input_port_default_value(port: int) -> Variant:
 		3, 4:
 			return 0.0
 		_:
-			return null
+			return Vector3(1.0, 1.0, 1.0)
 
 func _get_output_port_count() -> int:
 	return 1
diff --git a/addons/ShaderLib/Artistic/Adjustment/Saturation.gd b/addons/ShaderLib/Artistic/Adjustment/Saturation.gd
index ee23a2f..d295558 100644
--- a/addons/ShaderLib/Artistic/Adjustment/Saturation.gd
+++ b/addons/ShaderLib/Artistic/Adjustment/Saturation.gd
@@ -34,7 +34,7 @@ func _get_input_port_type(port: int) -> PortType:
 func _get_input_port_default_value(port: int) -> Variant:
 	match port:
 		0:
-			return null
+			return Vector3(1.0, 1.0, 1.0)
 		_:
 			return 1.0
 
diff --git a/addons/ShaderLib/Artistic/Adjustment/WhiteBalance.gd b/addons/ShaderLib/Artistic/Adjustment/WhiteBalance.gd
index f56d33b..f5a31e7 100644
--- a/addons/ShaderLib/Artistic/Adjustment/WhiteBalance.gd
+++ b/addons/ShaderLib/Artistic/Adjustment/WhiteBalance.gd
@@ -37,7 +37,7 @@ func _get_input_port_default_value(port: int) -> Variant:
 		1, 2:
 			return 0.0
 		_:
-			return null
+			return Vector3(1.0, 1.0, 1.0)
 
 func _get_output_port_count() -> int:
 	return 1
diff --git a/addons/ShaderLib/Artistic/Mask/ColorMask.gd b/addons/ShaderLib/Artistic/Mask/ColorMask.gd
index 7117d2e..fbd0b5a 100644
--- a/addons/ShaderLib/Artistic/Mask/ColorMask.gd
+++ b/addons/ShaderLib/Artistic/Mask/ColorMask.gd
@@ -36,12 +36,12 @@ func _get_input_port_type(port: int) -> PortType:
 
 func _get_input_port_default_value(port: int) -> Variant:
 	match port:
+		0:
+			return Vector3(1.0, 1.0, 1.0)
 		1:
 			return Vector3(0.0, 0.0, 0.0)
-		2, 3:
-			return 0.0
 		_:
-			return null
+			return 0.0
 
 func _get_output_port_count() -> int:
 	return 1