diff --git a/mods/dreambuilder_extras/customize-dreambuilder-game.sh b/mods/dreambuilder_extras/customize-dreambuilder-game.sh
index 0daef829..7768fbaa 100755
--- a/mods/dreambuilder_extras/customize-dreambuilder-game.sh
+++ b/mods/dreambuilder_extras/customize-dreambuilder-game.sh
@@ -281,7 +281,6 @@ sed -i '/size\[8,7;\]/ {
 
 sed -i "0, /depends = /s//depends = dreambuilder_gui_theming, /" $workdir"/mods/vessels/mod.conf"
 
-
 sed -i 's/"field\[.*\]"/ \
 \t\t\t"formspec_version[4]".. \
 \t\t\t"size[8,4]".. \
@@ -290,6 +289,21 @@ sed -i 's/"field\[.*\]"/ \
 \t\t/' \
        $workdir"/mods/technic/machines/switching_station.lua"
 
+# the inv and slots images below are exactly 192x192 and 512x256 pixels
+# and meant to cover inv areas of 3x3 and 8x4 inv slots
+# but with an 8x9 formspec size, it takes a declared size of [10.03, 4.65]
+# to make the 8x4 grid image fit right
+# [10.03, 4.65] / [8, 4] = [1.254, 1.163]
+#
+# so a 3x3 inv grid should be about 3.762x3.488 real size
+
+sed -i '/size\[8,9\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[2.9,0.93;3.762,3.488;technic_battery_box_upper_slots.png]"..
+	}' $workdir"/mods/technic/machines/register/battery_box.lua"
+
+
 sed -i 's/"field\[.*")/ \
 \t\t\t\t\t\t"formspec_version[4]".. \
 \t\t\t\t\t\t"size[8,4]".. \
@@ -298,6 +312,64 @@ sed -i 's/"field\[.*")/ \
 \t\t\t\t\t)/' \
        $workdir"/mods/technic/machines/register/battery_box.lua"
 
+sed -i '/size\[8,9;\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[2.9,0.93;5.016,2.326;technic_base_machine_upper_bg.png]"..
+	}' $workdir"/mods/technic/machines/register/machine_base.lua"
+
+sed -i '/formspec = formspec/ {
+	a \\t\t\t"image[0.91,2.93;2.508,1.163;technic_base_machine_upgrade_slots_bg.png]"..
+	}' $workdir"/mods/technic/machines/register/machine_base.lua"
+
+sed -i '/size\[8,9;\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[2.9,0.93;1.254,1.163;technic_single_slot.png]"..
+	}' $workdir"/mods/technic/machines/register/generator.lua"
+
+# this alloy furnace change will match in two places, on purpose.
+sed -i '/size\[8,9\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[1.9,0.93;6.27,3.49;technic_coal_alloy_furnace_upper_slots.png]"..
+	}' $workdir"/mods/technic/machines/other/coal_alloy_furnace.lua"
+
+sed -i '/size\[8,9;\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[-0.1,1.92;10.03,2.375;technic_injector_upper_slots.png]"..
+	}' $workdir"/mods/technic/machines/other/injector.lua"
+
+sed -i '/size\[8,9;\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[2.9,0.93;1.254,1.163;technic_single_slot.png]"..
+	a \\t\t"image[0.91,2.93;2.508,1.163;technic_base_machine_upgrade_slots_bg.png]"..
+	}' $workdir"/mods/technic/machines/MV/tool_workshop.lua"
+
+sed -i '/size\[8,9\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[1.9,0.93;3.76,2.325;technic_reactor_upper_slots.png]"..
+	}' $workdir"/mods/technic/machines/HV/nuclear_reactor.lua"
+
+sed -i '/size\[8,9;\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t\t\t"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+	}' $workdir"/mods/technic/machines/other/constructor.lua"
+
+sed -i '/list\[current_name/ {
+	i \\t\t\t\t\t.."image[5.89,"..(i*0.998-1.07)..";1.254,1.163;technic_single_slot.png]"
+	}' $workdir"/mods/technic/machines/other/constructor.lua"
+
+sed -i '/size\[9,11;\]/ {
+	r /tmp/LISTCOLORS_HIDE_SLOTS
+	a \\t\t"image[-0.1,6.92;10.03,4.65;technic_standard_inv.png]"..
+	a \\t\t"image[-0.1,5.42;11.28,1.163;technic_cnc_upper_slots.png]"..
+	}' $workdir"/mods/technic_cnc/cnc.lua"
+
+sed -i "0, /depends = /s//depends = dreambuilder_gui_theming, /" $workdir"/mods/technic/mod.conf"
 
 sed -i '/local n = 4/ {
 	i \\tformspec[4]="style_type[image_button;bgcolor="..dreambuilder_theme.form_bgcolor.."]"
diff --git a/mods/dreambuilder_gui_theming/textures/technic_base_machine_upgrade_slots_bg.png b/mods/dreambuilder_gui_theming/textures/technic_base_machine_upgrade_slots_bg.png
new file mode 100644
index 00000000..4c544c58
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_base_machine_upgrade_slots_bg.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_base_machine_upper_bg.png b/mods/dreambuilder_gui_theming/textures/technic_base_machine_upper_bg.png
new file mode 100644
index 00000000..dc7cb407
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_base_machine_upper_bg.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_battery_box_upper_slots.png b/mods/dreambuilder_gui_theming/textures/technic_battery_box_upper_slots.png
new file mode 100644
index 00000000..72514d33
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_battery_box_upper_slots.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_cnc_upper_slots.png b/mods/dreambuilder_gui_theming/textures/technic_cnc_upper_slots.png
new file mode 100644
index 00000000..77dc1fcd
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_cnc_upper_slots.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_coal_alloy_furnace_upper_slots.png b/mods/dreambuilder_gui_theming/textures/technic_coal_alloy_furnace_upper_slots.png
new file mode 100644
index 00000000..34a8ec88
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_coal_alloy_furnace_upper_slots.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_injector_upper_slots.png b/mods/dreambuilder_gui_theming/textures/technic_injector_upper_slots.png
new file mode 100644
index 00000000..def4f747
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_injector_upper_slots.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_reactor_upper_slots.png b/mods/dreambuilder_gui_theming/textures/technic_reactor_upper_slots.png
new file mode 100644
index 00000000..ede6bbaa
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_reactor_upper_slots.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_single_slot.png b/mods/dreambuilder_gui_theming/textures/technic_single_slot.png
new file mode 100644
index 00000000..428da1e8
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_single_slot.png differ
diff --git a/mods/dreambuilder_gui_theming/textures/technic_standard_inv.png b/mods/dreambuilder_gui_theming/textures/technic_standard_inv.png
new file mode 100644
index 00000000..267e51b5
Binary files /dev/null and b/mods/dreambuilder_gui_theming/textures/technic_standard_inv.png differ
diff --git a/mods/signs_lib/mod.conf b/mods/signs_lib/mod.conf
index 11641653..82af3616 100644
--- a/mods/signs_lib/mod.conf
+++ b/mods/signs_lib/mod.conf
@@ -3,4 +3,4 @@ author = VanessaE
 depends = default
 optional_depends = intllib, screwdriver, streetspoles, streetlamps, cottages, prefab_redo
 description = Adds signs with readable text.
-min_minetest_version = 5.2.0
+min_minetest_version = 5.4.0
diff --git a/mods/technic/machines/HV/nuclear_reactor.lua b/mods/technic/machines/HV/nuclear_reactor.lua
index abaeb743..606ee64e 100644
--- a/mods/technic/machines/HV/nuclear_reactor.lua
+++ b/mods/technic/machines/HV/nuclear_reactor.lua
@@ -32,6 +32,11 @@ minetest.register_craft({
 
 local function make_reactor_formspec(meta)
 	local f = "size[8,9]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[1.9,0.93;3.76,2.325;technic_reactor_upper_slots.png]"..
 	"label[0,0;"..S("Nuclear Reactor Rod Compartment").."]"..
 	"list[current_name;src;2,1;3,2;]"..
 	"list[current_player;main;0,5;8,4;]"..
diff --git a/mods/technic/machines/MV/tool_workshop.lua b/mods/technic/machines/MV/tool_workshop.lua
index 678a1fd0..874e8ba5 100644
--- a/mods/technic/machines/MV/tool_workshop.lua
+++ b/mods/technic/machines/MV/tool_workshop.lua
@@ -20,6 +20,12 @@ local workshop_demand = {5000, 3500, 2000}
 
 local workshop_formspec =
 	"size[8,9;]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[2.9,0.93;1.254,1.163;technic_single_slot.png]"..
+		"image[0.91,2.93;2.508,1.163;technic_base_machine_upgrade_slots_bg.png]"..
 	"list[current_name;src;3,1;1,1;]"..
 	"label[0,0;"..S("%s Tool Workshop"):format("MV").."]"..
 	"list[current_name;upgrade1;1,3;1,1;]"..
diff --git a/mods/technic/machines/other/coal_alloy_furnace.lua b/mods/technic/machines/other/coal_alloy_furnace.lua
index c2de1511..3a0253ce 100644
--- a/mods/technic/machines/other/coal_alloy_furnace.lua
+++ b/mods/technic/machines/other/coal_alloy_furnace.lua
@@ -15,6 +15,11 @@ minetest.register_craft({
 local machine_name = S("Fuel-Fired Alloy Furnace")
 local formspec =
 	"size[8,9]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[1.9,0.93;6.27,3.49;technic_coal_alloy_furnace_upper_slots.png]"..
 	"label[0,0;"..machine_name.."]"..
 	"image[2,2;1,1;default_furnace_fire_bg.png]"..
 	"list[current_name;fuel;2,3;1,1;]"..
@@ -124,6 +129,11 @@ minetest.register_abm({
 			technic.swap_node(pos, "technic:coal_alloy_furnace_active")
 			meta:set_string("formspec",
 					"size[8,9]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[1.9,0.93;6.27,3.49;technic_coal_alloy_furnace_upper_slots.png]"..
 					"label[0,0;"..machine_name.."]"..
 					"image[2,2;1,1;default_furnace_fire_bg.png^[lowpart:"..
 					(100 - percent)..":default_furnace_fire_fg.png]"..
diff --git a/mods/technic/machines/other/constructor.lua b/mods/technic/machines/other/constructor.lua
index 9117224c..a50ad93c 100644
--- a/mods/technic/machines/other/constructor.lua
+++ b/mods/technic/machines/other/constructor.lua
@@ -146,11 +146,16 @@ local function make_constructor(mark, length)
 		on_construct = function(pos)
 			local meta = minetest.get_meta(pos)
 			local formspec = "size[8,9;]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+				"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
 				"label[0,0;"..S("Constructor Mk%d"):format(mark).."]"..
 				"list[current_player;main;0,5;8,4;]"
 			for i = 1, length do
 				formspec = formspec
 					.."label[5,"..(i - 1)..";"..S("Slot %d"):format(i).."]"
+					.."image[5.89,"..(i*0.998-1.07)..";1.254,1.163;technic_single_slot.png]"
 					.."list[current_name;slot"..i
 						..";6,"..(i - 1)..";1,1;]"
 			end
diff --git a/mods/technic/machines/other/injector.lua b/mods/technic/machines/other/injector.lua
index 6bd5a833..eaf70d37 100644
--- a/mods/technic/machines/other/injector.lua
+++ b/mods/technic/machines/other/injector.lua
@@ -56,6 +56,11 @@ local function set_injector_formspec(meta)
 	local is_stack = meta:get_string("mode") == "whole stacks"
 	meta:set_string("formspec",
 		"size[8,9;]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[-0.1,1.92;10.03,2.375;technic_injector_upper_slots.png]"..
 		"item_image[0,0;1,1;technic:injector]"..
 		"label[1,0;"..S("Self-Contained Injector").."]"..
 		(is_stack and
diff --git a/mods/technic/machines/register/battery_box.lua b/mods/technic/machines/register/battery_box.lua
index 30049a6d..29e8886a 100644
--- a/mods/technic/machines/register/battery_box.lua
+++ b/mods/technic/machines/register/battery_box.lua
@@ -162,6 +162,11 @@ function technic.register_battery_box(data)
 
 	local formspec =
 		"size[8,9]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[2.9,0.93;3.762,3.488;technic_battery_box_upper_slots.png]"..
 		"image[1,1;1,2;technic_power_meter_bg.png]"..
 		"list[context;src;3,1;1,1;]"..
 		"image[4,1;1,1;technic_battery_reload.png]"..
diff --git a/mods/technic/machines/register/generator.lua b/mods/technic/machines/register/generator.lua
index 9120e29a..e400b4b4 100644
--- a/mods/technic/machines/register/generator.lua
+++ b/mods/technic/machines/register/generator.lua
@@ -36,6 +36,11 @@ function technic.register_generator(data)
 
 	local generator_formspec =
 		"size[8,9;]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[2.9,0.93;1.254,1.163;technic_single_slot.png]"..
 		"label[0,0;"..S("Fuel-Fired %s Generator"):format(tier).."]"..
 		"list[current_name;src;3,1;1,1;]"..
 		"image[4,1;1,1;default_furnace_fire_bg.png]"..
diff --git a/mods/technic/machines/register/machine_base.lua b/mods/technic/machines/register/machine_base.lua
index 8e1dee77..942dd094 100644
--- a/mods/technic/machines/register/machine_base.lua
+++ b/mods/technic/machines/register/machine_base.lua
@@ -51,6 +51,11 @@ function technic.register_base_machine(data)
 
 	local formspec =
 		"size[8,9;]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,4.93;10.03,4.65;technic_standard_inv.png]"..
+		"image[2.9,0.93;5.016,2.326;technic_base_machine_upper_bg.png]"..
 		"list[current_name;src;"..(4-input_size)..",1;"..input_size..",1;]"..
 		"list[current_name;dst;5,1;2,2;]"..
 		"list[current_player;main;0,5;8,4;]"..
@@ -61,6 +66,7 @@ function technic.register_base_machine(data)
 		"listring[current_player;main]"
 	if data.upgrade then
 		formspec = formspec..
+			"image[0.91,2.93;2.508,1.163;technic_base_machine_upgrade_slots_bg.png]"..
 			"list[current_name;upgrade1;1,3;1,1;]"..
 			"list[current_name;upgrade2;2,3;1,1;]"..
 			"label[1,4;"..S("Upgrade Slots").."]"..
diff --git a/mods/technic/mod.conf b/mods/technic/mod.conf
index f2cefaa9..013060b7 100644
--- a/mods/technic/mod.conf
+++ b/mods/technic/mod.conf
@@ -1,3 +1,3 @@
 name = technic
-depends = default, pipeworks, technic_worldgen, basic_materials
+depends = dreambuilder_gui_theming, default, pipeworks, technic_worldgen, basic_materials
 optional_depends = bucket, screwdriver, mesecons, mesecons_mvps, digilines, digiline_remote, intllib, unified_inventory, vector_extras, dye
diff --git a/mods/technic_cnc/cnc.lua b/mods/technic_cnc/cnc.lua
index cb81bd48..243ad246 100644
--- a/mods/technic_cnc/cnc.lua
+++ b/mods/technic_cnc/cnc.lua
@@ -100,6 +100,11 @@ local twosize_products = {
 
 local cnc_formspec =
 	"size[9,11;]"..
+		"listcolors[#00000000;#00000000;#00000000;"..
+			dreambuilder_theme.tooltip_bgcolor..";"..
+			dreambuilder_theme.tooltip_fontcolor.."]"..
+		"image[-0.1,6.92;10.03,4.65;technic_standard_inv.png]"..
+		"image[-0.1,5.42;11.28,1.163;technic_cnc_upper_slots.png]"..
 	"label[1,0;"..S("Choose Milling Program:").."]"..
 	"image_button[1,0.5;1,1;technic_cnc_slope.png;slope; ]"..
 	"image_button[2,0.5;1,1;technic_cnc_slope_edge.png;slope_edge; ]"..