Added a new tool (LayeredTextureMaker). I'm hoping to simplify icon creation with it.

game/project.godot

@@ -44,6 +44,11 @@ _global_script_classes=[ {
 "language": "GDScript",
 "path": "res://scripts/items/ItemTemplateGD.gd"
 }, {
+"base": "Node2D",
+"class": "LayeredTextureMaker",
+"language": "GDScript",
+"path": "res://texture_tools/LayeredTextureMaker.gd"
+}, {
 "base": "Node",
 "class": "Main",
 "language": "GDScript",
@@ -152,6 +157,7 @@ _global_script_class_icons={
 "EntityDataGD": "",
 "GDCubicVoxelMesher": "",
 "ItemTemplateGD": "",
+"LayeredTextureMaker": "",
 "Main": "",
 "MainDungeonGenerator": "",
 "MainPlanetGenerator": "",

game/texture_tools/LayeredTextureMaker.gd

@@ -0,0 +1,102 @@
+tool
+extends Node2D
+class_name LayeredTextureMaker
+
+export(Vector2) var texture_size = Vector2(16, 16) setget set_tex_size
+export(String) var texture_name = ""
+
+export(float) var refresh_rate : float = 2.0
+export(bool) var save : bool = false setget save_set
+
+var preview_node : Sprite = null
+var viewport : Viewport = null
+
+var last_refresh : float = 0
+
+func _enter_tree():
+	set_meta("_edit_lock_", true)
+	emit_signal("item_lock_status_changed")
+	create_preview()
+	
+func create_preview():
+	for c in get_children():
+		if c.name == "Preview":
+			preview_node = c
+			
+			for ch in preview_node.get_children():
+				if ch is Viewport:
+					viewport = ch as Viewport
+					break
+				
+			break
+
+	if viewport != null:
+		viewport.queue_free()
+		
+	if preview_node != null:
+		preview_node.queue_free()
+		
+		
+	preview_node = Sprite.new() as Sprite
+	preview_node.name = "Preview"
+	preview_node.centered = false
+	add_child(preview_node)
+		
+	#don't, so it won't show up in the inspector
+	#if Engine.editor_hint:
+	#	preview_node.owner = get_tree().edited_scene_root
+	
+	viewport = Viewport.new()
+	preview_node.add_child(viewport)
+	
+	#don't, so it won't show up in the inspector
+	#if Engine.editor_hint:
+	#	viewport.owner = get_tree().edited_scene_root
+		
+	viewport.set_vflip(true)
+	viewport.set_size(texture_size)
+	preview_node.set_texture(null)
+	preview_node.set_texture(viewport.get_texture())
+	
+	set_process(true)
+
+func _process(delta):
+	#not the best solution, but works for now
+	last_refresh += delta
+	
+	if (last_refresh > refresh_rate):
+		last_refresh -= refresh_rate
+		
+		for ch in viewport.get_children():
+			ch.queue_free()
+			
+		for ch in get_children():
+			viewport.add_child(ch.duplicate())
+			
+		if get_children().has(preview_node) and get_child(get_child_count() - 1) != preview_node:
+			move_child(preview_node, get_child_count() - 1)
+			
+
+func save() -> void:
+	if texture_name == "":
+		print("Set a name for your texture!")
+		return
+	
+func preview_refresh() -> void:
+	for ch in viewport.get_children():
+		ch.queue_free()
+		
+	for ch in get_children():
+		if ch.name == "Preview":
+			continue
+			
+		viewport.add_child(ch.duplicate())
+
+func set_tex_size(size : Vector2) -> void:
+	texture_size = size
+	
+	create_preview()
+
+func save_set(val):
+	if val:
+		save()

game/texture_tools/test/ToolTest.tscn

@@ -0,0 +1,10 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://texture_tools/LayeredTextureMaker.gd" type="Script" id=1]
+
+[node name="LayeredTextureMaker" type="Node2D"]
+script = ExtResource( 1 )
+__meta__ = {
+"_edit_lock_": true
+}
+refresh_rate = 3.0