diff --git a/Assets/Scripts/Gui/techTree.lua b/Assets/Scripts/Gui/techTree.lua
index 05bfe30..2118987 100644
--- a/Assets/Scripts/Gui/techTree.lua
+++ b/Assets/Scripts/Gui/techTree.lua
@@ -38,10 +38,10 @@ gui = {
 		pos = {x = Pos.x + margin.left, y = Pos.y + margin.top + 2 * heightOffset},
 		size = techButtonSize,
 		name = "Research",
-		imagePath = baseTechPath .. 'fpt.jpg',
+		imagePath = baseTechPath .. 'cruisers.jpg',
 		guiType = GuiType.BUTTON,
 		buttonType = ButtonType.RESEARCH,
-		techId = TechId.FPT,
+		techId = TechId.CRUISERS,
 		trigger = 82,
 	},
 	{
@@ -58,20 +58,20 @@ gui = {
 		pos = {x = Pos.x + .5 * (Size.x - 3 * techButtonSize.x), y = Pos.y + margin.top + 2 * heightOffset},
 		size = techButtonSize,
 		name = "Research",
-		imagePath = baseTechPath .. 'ept.jpg',
+		imagePath = baseTechPath .. 'stealth.jpg',
 		guiType = GuiType.BUTTON,
 		buttonType = ButtonType.RESEARCH,
-		techId = TechId.EFT,
+		techId = TechId.ST_SUB,
 		trigger = 82,
 	},
 	{
 		pos = {x = Pos.x + .5 * (Size.x + 3 * techButtonSize.x), y = Pos.y + margin.top + 2 * heightOffset},
 		size = techButtonSize,
 		name = "Research",
-		imagePath = baseTechPath .. 'ept.jpg',
+		imagePath = baseTechPath .. 'robo.jpg',
 		guiType = GuiType.BUTTON,
 		buttonType = ButtonType.RESEARCH,
-		techId = TechId.EFT,
+		techId = TechId.ROBO,
 		trigger = 82,
 	},
 	{
@@ -88,22 +88,20 @@ gui = {
 		pos = {x = Pos.x + Size.x - (margin.right + 3 * techButtonSize.x), y = Pos.y + margin.top + 2 * heightOffset},
 		size = techButtonSize,
 		name = "Research",
-		imagePath = baseTechPath .. 'pct.jpg',
+		imagePath = baseTechPath .. 'carriers.jpg',
 		guiType = GuiType.BUTTON,
 		buttonType = ButtonType.RESEARCH,
-		techId = TechId.PCT,
+		techId = TechId.CARRIERS,
 		trigger = 82,
 	},
 	{
 		pos = {x = Pos.x + Size.x - (margin.right + techButtonSize.x), y = Pos.y + margin.top + 2 * heightOffset},
 		size = techButtonSize,
 		name = "Research",
-		imagePath = baseTechPath .. 'pct.jpg',
+		imagePath = baseTechPath .. 'tanks.jpg',
 		guiType = GuiType.BUTTON,
 		buttonType = ButtonType.RESEARCH,
-		techId = TechId.PCT,
+		techId = TechId.TANKS,
 		trigger = 82,
 	},
-	--[[
-	]]--
 }
diff --git a/Assets/Textures/Icons/Technologies/advancedTower.png b/Assets/Textures/Icons/Technologies/carriers.jpg
similarity index 100%
rename from Assets/Textures/Icons/Technologies/advancedTower.png
rename to Assets/Textures/Icons/Technologies/carriers.jpg
diff --git a/Assets/Textures/Icons/Technologies/carrierFoundation.png b/Assets/Textures/Icons/Technologies/cruisers.jpg
similarity index 100%
rename from Assets/Textures/Icons/Technologies/carrierFoundation.png
rename to Assets/Textures/Icons/Technologies/cruisers.jpg
diff --git a/Assets/Textures/Icons/Technologies/siegeFactory.jpg b/Assets/Textures/Icons/Technologies/robo.jpg
similarity index 100%
rename from Assets/Textures/Icons/Technologies/siegeFactory.jpg
rename to Assets/Textures/Icons/Technologies/robo.jpg
diff --git a/Assets/Textures/Icons/Technologies/tacticalCruiser.png b/Assets/Textures/Icons/Technologies/stealth.jpg
similarity index 100%
rename from Assets/Textures/Icons/Technologies/tacticalCruiser.png
rename to Assets/Textures/Icons/Technologies/stealth.jpg
diff --git a/Assets/Textures/Icons/Technologies/tanks.jpg b/Assets/Textures/Icons/Technologies/tanks.jpg
new file mode 100755
index 0000000..a1451cc
Binary files /dev/null and b/Assets/Textures/Icons/Technologies/tanks.jpg differ
diff --git a/game.cpp b/game.cpp
index 5fd9e7a..b8b850e 100644
--- a/game.cpp
+++ b/game.cpp
@@ -244,13 +244,11 @@ namespace battleship{
 			sol::table techTable = SOL_LUA_VIEW[techKey][i + 1];
 
 			Technology t;
-			t.id = techTable["id"];
 			t.cost = techTable["cost"];
 			t.name = techTable["name"];
 			t.icon = techTable["icon"];
 			t.description = techTable["description"];
 			t.parents = parseTechTable(i, techKey, "numParents", "parents");
-			t.children = parseTechTable(i, techKey, "numChildren", "children");
 			t.abilities = parseTechTable(i, techKey, "numAbilities", "abilities");
 
 			technologies.push_back(t);
diff --git a/researchButton.cpp b/researchButton.cpp
index 2c8fc03..e3afa47 100644
--- a/researchButton.cpp
+++ b/researchButton.cpp
@@ -60,7 +60,7 @@ namespace battleship{
 			bool hasTechParents = true;
 
 			for(int tp : techParents)
-				if(find(technologies.begin(), technologies.end(), techId) == technologies.end()){
+				if(find(technologies.begin(), technologies.end(), tp) == technologies.end()){
 					hasTechParents = false;
 					break;
 				}
diff --git a/technology.h b/technology.h
index c93985f..88d863e 100644
--- a/technology.h
+++ b/technology.h
@@ -6,12 +6,11 @@
 
 namespace battleship{
 	struct Technology{
-		int id, cost;
+		int cost;
 		std::string name;
 		std::string icon;
 		std::string description;
 		std::vector<int> parents;
-		std::vector<int> children;
 		std::vector<int> abilities;
 	};
 }