diff --git a/addons/material_maker/engine/gen_graph.gd b/addons/material_maker/engine/gen_graph.gd
index 6ed6299..8fb9859 100644
--- a/addons/material_maker/engine/gen_graph.gd
+++ b/addons/material_maker/engine/gen_graph.gd
@@ -2,22 +2,48 @@ tool
 extends MMGenBase
 class_name MMGenGraph
 
+var label : String = "Graph"
 var connections = []
 
 func get_type():
 	return "graph"
 
+func get_type_name():
+	return label
+
+func get_parameter_defs():
+	return []
+
+func get_input_defs():
+	var inputs = get_node("gen_inputs")
+	if inputs != null:
+		return inputs.get_input_defs()
+	return []
+
+func get_output_defs():
+	var outputs = get_node("gen_outputs")
+	if outputs != null:
+		return outputs.get_output_defs()
+	return []
+
 func get_port_source(gen_name: String, input_index: int) -> OutputPort:
-	for c in connections:
-		if c.to == gen_name and c.to_port == input_index:
-			var src_gen = get_node(c.from)
-			if src_gen != null:
-				return OutputPort.new(src_gen, c.from_port)
+	if gen_name == "gen_inputs":
+		var parent = get_parent()
+		if parent != null and parent.get_type() == "graph":
+			return parent.get_port_source(name, input_index)
+	else:
+		for c in connections:
+			if c.to == gen_name and c.to_port == input_index:
+				var src_gen = get_node(c.from)
+				if src_gen != null:
+					if src_gen.get_type() == "graph":
+						return src_gen.get_port_source("gen_outputs", c.from_port)
+					return OutputPort.new(src_gen, c.from_port)
 	return null
 
-func get_port_target(gen_name: String, input_index: int) -> InputPort:
+func get_port_target(gen_name: String, output_index: int) -> InputPort:
 	for c in connections:
-		if c.from == gen_name and c.from_port == input_index:
+		if c.from == gen_name and c.from_port == output_index:
 			var tgt_gen = get_node(c.to)
 			if tgt_gen != null:
 				return InputPort.new(tgt_gen, c.to_port)
@@ -65,7 +91,15 @@ func disconnect_children(from, from_port : int, to, to_port : int):
 		connections.remove(remove)
 	return true
 
+func _get_shader_code(uv : String, output_index : int, context : MMGenContext):
+	print("Getting shader code from graph")
+	var outputs = get_node("gen_outputs")
+	if outputs != null:
+		outputs._get_shader_code(uv, output_index, context)
+	return { defs="", code="", textures={} }
+
 func _serialize(data):
+	data.label = label
 	data.nodes = []
 	for c in get_children():
 		data.nodes.append(c.serialize())
diff --git a/addons/material_maker/engine/gen_ios.gd b/addons/material_maker/engine/gen_ios.gd
new file mode 100644
index 0000000..38ee958
--- /dev/null
+++ b/addons/material_maker/engine/gen_ios.gd
@@ -0,0 +1,50 @@
+tool
+extends MMGenBase
+class_name MMGenIOs
+
+"""
+IOs just forward their inputs to their outputs and are used to specify graph interfaces
+"""
+
+var mask : int = 3
+var ports : Array = []
+
+func _ready():
+	if !parameters.has("size"):
+		parameters.size = 4
+
+func get_type():
+	return "buffer"
+
+func get_type_name():
+	match mask:
+		1: return "Inputs"
+		2: return "Output"
+		_: return "IOs"
+	return "Buffer"
+
+func get_input_defs():
+	var rv : Array = []
+	if mask != 2:
+		for p in ports:
+			rv.push_back({ name=p.name, type="rgba" })
+	return rv
+	
+func get_output_defs():
+	var rv : Array = []
+	if mask != 2:
+		for p in ports:
+			rv.push_back({ name=p.name, type="rgba" })
+	return rv
+
+func _get_shader_code(uv : String, output_index : int, context : MMGenContext):
+	print("Getting shader code from ios")
+	if mask != 2:
+		var source = get_source(output_index)
+		if source != null:
+			return source.generator._get_shader_code(uv, source.output_index, context)
+	return { defs="", code="", textures={} }
+
+func _serialize(data):
+	data.type = "buffer"
+	return data
diff --git a/addons/material_maker/engine/loader.gd b/addons/material_maker/engine/loader.gd
index efcf467..e4b41fe 100644
--- a/addons/material_maker/engine/loader.gd
+++ b/addons/material_maker/engine/loader.gd
@@ -11,9 +11,11 @@ static func load_gen(filename: String) -> MMGenBase:
 
 static func add_to_gen_graph(gen_graph, generators, connections):
 	var rv = { generators=[], connections=[] }
+	var gennames = {}
 	for n in generators:
 		var g = create_gen(n)
 		if g != null:
+			var orig_name = g.name
 			var name = g.name
 			var index = 1
 			while gen_graph.has_node(name):
@@ -22,15 +24,21 @@ static func add_to_gen_graph(gen_graph, generators, connections):
 			g.name = name
 			gen_graph.add_child(g)
 			rv.generators.append(g)
+			gennames[orig_name] = name
 	for c in connections:
-		gen_graph.connections.append(c)
-		rv.connections.append(c)
+		if gennames.has(c.from) and gennames.has(c.to):
+			c.from = gennames[c.from]
+			c.to = gennames[c.to]
+			gen_graph.connections.append(c)
+			rv.connections.append(c)
 	return rv
 
 static func create_gen(data) -> MMGenBase:
 	var generator = null
 	if data.has("connections") and data.has("nodes"):
 		generator = MMGenGraph.new()
+		if data.has("label"):
+			generator.label = data.label
 		add_to_gen_graph(generator, data.nodes, data.connections)
 	elif data.has("shader_model"):
 		generator = MMGenShader.new()
@@ -48,6 +56,9 @@ static func create_gen(data) -> MMGenBase:
 			generator = MMGenBuffer.new()
 		elif data.type == "image":
 			generator = MMGenImage.new()
+		elif data.type == "ios":
+			generator = MMGenIOs.new()
+			generator.ports = data.ports
 		else:
 			var file = File.new()
 			if file.open("res://addons/material_maker/nodes/"+data.type+".mmg", File.READ) == OK:
diff --git a/addons/material_maker/graph_edit.gd b/addons/material_maker/graph_edit.gd
index e8efb4a..89b2cc8 100644
--- a/addons/material_maker/graph_edit.gd
+++ b/addons/material_maker/graph_edit.gd
@@ -99,6 +99,7 @@ func clear_material():
 	send_changed_signal()
 
 func update_graph(generators, connections):
+	var rv = []
 	for g in generators:
 		var node = node_factory.create_node(g.get_type())
 		if node != null:
@@ -106,8 +107,10 @@ func update_graph(generators, connections):
 			add_node(node)
 			node.generator = g
 		node.offset = g.position
+		rv.push_back(node)
 	for c in connections:
 		.connect_node("node_"+c.from, c.from_port, "node_"+c.to, c.to_port)
+	return rv
 
 func new_material():
 	clear_material()
@@ -137,7 +140,8 @@ func create_nodes(data, position : Vector2 = Vector2(0, 0)):
 		var new_stuff = MMGenLoader.add_to_gen_graph(generator, data.nodes, data.connections)
 		for g in new_stuff.generators:
 			g.position += position
-		update_graph(new_stuff.generators, new_stuff.connections)
+		return update_graph(new_stuff.generators, new_stuff.connections)
+	return []
 
 func load_file(filename):
 	clear_material()
@@ -172,6 +176,7 @@ func remove_selection():
 		if c is GraphNode and c.selected and c.name != "Material":
 			remove_node(c)
 
+# Maybe move this to gen_graph...
 func serialize_selection():
 	var data = { nodes = [], connections = [] }
 	var nodes = []
@@ -193,7 +198,10 @@ func serialize_selection():
 		var from = get_node(c.from)
 		var to = get_node(c.to)
 		if from != null and from.selected and to != null and to.selected:
-			data.connections.append(c)
+			var connection = c.duplicate(true)
+			connection.from = from.generator.name
+			connection.to = to.generator.name
+			data.connections.append(connection)
 	return data
 
 func can_copy():
@@ -214,7 +222,8 @@ func paste(pos = Vector2(0, 0)):
 		if c is GraphNode:
 			c.selected = false
 	var data = parse_json(OS.clipboard)
-	create_nodes(data, scroll_offset+0.5*rect_size)
+	for c in create_nodes(data, scroll_offset+0.5*rect_size):
+		c.selected = true
 
 # Center view
 
diff --git a/addons/material_maker/nodes/normal_map.mmg b/addons/material_maker/nodes/normal_map.mmg
new file mode 100644
index 0000000..9ddeea0
--- /dev/null
+++ b/addons/material_maker/nodes/normal_map.mmg
@@ -0,0 +1 @@
+{"label":"Normal Map","connections":[{"from":"nm_convolution","from_port":0,"to":"nm_postprocess","to_port":0},{"from":"nm_postprocess","from_port":0,"to":"gen_outputs","to_port":0},{"from":"gen_inputs","from_port":0,"to":"nm_convolution","to_port":0}],"nodes":[{"name":"gen_inputs","type":"ios","ports":[{"name":""}],"node_position":{"x":-89.25,"y":-73.75}},{"name":"gen_outputs","type":"ios","ports":[{"name":""}],"node_position":{"x":-89.25,"y":-73.75}},{"convolution_params":{"input_type":"f","matrix":[[[-1,-1,0],[0,-2,0],[1,-1,0]],[[-2,0,0],0,[2,0,0]],[[-1,1,0],[0,2,0],[1,1,0]]],"output_type":"rgb","x":1,"y":1},"name":"nm_convolution","node_position":{"x":-89.25,"y":-73.75},"parameters":{"size":7},"type":"shader"},{"name":"nm_postprocess","node_position":{"x":-98.25,"y":-6.75},"parameters":{"amount":0.995,"size":7},"shader_model":{"global":"","inputs":[{"default":"vec3(0.0)","label":"","name":"in","type":"rgb"}],"instance":"","name":"NormalMapPostProcess","outputs":[{"rgb":"0.5*normalize($in($uv)*$amount*$size/128.0-vec3(0.0, 0.0, 1.0))+vec3(0.5)","type":"rgb"}],"parameters":[{"default":8,"first":4,"label":"","last":11,"name":"size","type":"size"},{"default":1,"label":"","max":2,"min":0,"name":"amount","step":0.005,"type":"float"}]},"type":"shader"}]}
\ No newline at end of file
diff --git a/addons/material_maker/nodes/transform.mmg b/addons/material_maker/nodes/transform.mmg
index 2897272..620c91d 100644
--- a/addons/material_maker/nodes/transform.mmg
+++ b/addons/material_maker/nodes/transform.mmg
@@ -1 +1 @@
-{"name":"transform","node_position":{"x":0,"y":0},"parameters":{"repeat":false,"rotate":0,"scale_x":1,"scale_y":1,"translate_x":0.33,"translate_y":0.095},"shader_model":{"global":"vec2 transform(vec2 uv, vec2 translate, float rotate, vec2 scale, bool repeat) {\n \tvec2 rv;\n\tuv -= vec2(0.5);\n\trv.x = cos(rotate)*uv.x + sin(rotate)*uv.y;\n\trv.y = -sin(rotate)*uv.x + cos(rotate)*uv.y;\n\trv /= scale;\n\trv += vec2(0.5);\n\trv -= translate;\n    if (repeat) {\n\t\treturn fract(rv);\n\t} else {\n\t\treturn clamp(rv, vec2(0.0), vec2(1.0));\n\t}\t\n}","inputs":[{"default":"vec4($uv, 0.0, 1.0)","label":"","name":"i","type":"rgba"},{"default":"1.0","label":"","name":"tx","type":"f"},{"default":"1.0","label":"","name":"ty","type":"f"},{"default":"1.0","label":"","name":"r","type":"f"},{"default":"1.0","label":"","name":"sx","type":"f"},{"default":"1.0","label":"","name":"sy","type":"f"}],"instance":"","name":"Transform","outputs":[{"rgba":"$i(transform($uv, vec2($translate_x*(2.0*$tx($uv)-1.0), $translate_y*(2.0*$ty($uv)-1.0)), $rotate*(2.0*$r($uv)-1.0), vec2($scale_x*(2.0*$sx($uv)-1.0), $scale_y*(2.0*$sy($uv)-1.0)), $repeat))","type":"rgba"}],"parameters":[{"default":0,"label":"2:Translate X:","max":1,"min":-1,"name":"translate_x","step":0.005,"type":"float","widget":"spinbox"},{"default":0,"label":"Translate Y:","max":1,"min":-1,"name":"translate_y","step":0.005,"type":"float","widget":"spinbox"},{"default":0,"label":"Rotate:","max":720,"min":-720,"name":"rotate","step":0.005,"type":"float","widget":"spinbox"},{"default":1,"label":"Scale X:","max":50,"min":0,"name":"scale_x","step":0.005,"type":"float","widget":"spinbox"},{"default":1,"label":"Scale Y:","max":50,"min":0,"name":"scale_y","step":0.005,"type":"float","widget":"spinbox"},{"default":false,"label":"Repeat:","name":"repeat","type":"boolean"}]}}
\ No newline at end of file
+{"name":"transform","node_position":{"x":0,"y":0},"parameters":{"repeat":false,"rotate":120,"scale_x":1,"scale_y":1,"translate_x":0,"translate_y":0},"shader_model":{"global":"vec2 transform(vec2 uv, vec2 translate, float rotate, vec2 scale, bool repeat) {\n \tvec2 rv;\n\tuv -= vec2(0.5);\n\trv.x = cos(rotate)*uv.x + sin(rotate)*uv.y;\n\trv.y = -sin(rotate)*uv.x + cos(rotate)*uv.y;\n\trv /= scale;\n\trv += vec2(0.5);\n\trv -= translate;\n    if (repeat) {\n\t\treturn fract(rv);\n\t} else {\n\t\treturn clamp(rv, vec2(0.0), vec2(1.0));\n\t}\t\n}","inputs":[{"default":"vec4($uv, 0.0, 1.0)","label":"","name":"i","type":"rgba"},{"default":"1.0","label":"","name":"tx","type":"f"},{"default":"1.0","label":"","name":"ty","type":"f"},{"default":"1.0","label":"","name":"r","type":"f"},{"default":"1.0","label":"","name":"sx","type":"f"},{"default":"1.0","label":"","name":"sy","type":"f"}],"instance":"","name":"Transform","outputs":[{"rgba":"$i(transform($uv, vec2($translate_x*(2.0*$tx($uv)-1.0), $translate_y*(2.0*$ty($uv)-1.0)), $rotate*0.01745329251*(2.0*$r($uv)-1.0), vec2($scale_x*(2.0*$sx($uv)-1.0), $scale_y*(2.0*$sy($uv)-1.0)), $repeat))","type":"rgba"}],"parameters":[{"default":0,"label":"2:Translate X:","max":1,"min":-1,"name":"translate_x","step":0.005,"type":"float","widget":"spinbox"},{"default":0,"label":"Translate Y:","max":1,"min":-1,"name":"translate_y","step":0.005,"type":"float","widget":"spinbox"},{"default":0,"label":"Rotate:","max":720,"min":-720,"name":"rotate","step":0.005,"type":"float","widget":"spinbox"},{"default":1,"label":"Scale X:","max":50,"min":0,"name":"scale_x","step":0.005,"type":"float","widget":"spinbox"},{"default":1,"label":"Scale Y:","max":50,"min":0,"name":"scale_y","step":0.005,"type":"float","widget":"spinbox"},{"default":false,"label":"Repeat:","name":"repeat","type":"boolean"}]},"type":"shader"}
\ No newline at end of file