diff --git a/lib_planes/utilities.lua b/lib_planes/utilities.lua
index 37b49f4..e65db16 100644
--- a/lib_planes/utilities.lua
+++ b/lib_planes/utilities.lua
@@ -875,10 +875,12 @@ function airutils.param_paint(self, colstr, colstr_2)
     end
 end
 
-function airutils.paint_with_mask(self, colstr, target_texture, mask_texture)
+function airutils.paint_with_mask(self, colstr, target_texture, mask_texture, mask_colstr)
     if colstr then
         self._color = colstr
-        self._det_color = mask_colstr -- !!! accessing undefined variable mask_colstr
+        if mask_colstr then
+            self._det_color = mask_colstr
+        end
         local l_textures = self.initial_properties.textures
         for _, texture in ipairs(l_textures) do
             local indx = texture:find(target_texture)
@@ -891,7 +893,7 @@ function airutils.paint_with_mask(self, colstr, target_texture, mask_texture)
     end
 end
 
-function airutils.pid_controller(current_value, setpoint, last_error, d_time, kp, ki, kd)
+function airutils.pid_controller(current_value, setpoint, last_error, d_time, kp, ki, kd, integrative)
     kp = kp or 0
     ki = ki or 0.00000000000001
     kd = kd or 0.005
@@ -903,7 +905,7 @@ function airutils.pid_controller(current_value, setpoint, last_error, d_time, kp
     local _error = setpoint - current_value
     local derivative = _error - last_error
     --local output = kpv*erro + (kpv/Tiv)*I + kpv*Tdv*((erro - erro_passado)/delta_t);
-    if integrative == nil then integrative = 0 end -- !!! accessing undefined variable integrative
+    if integrative == nil then integrative = 0 end
     integrative = integrative + (((_error + last_error)/delta_t)/2);
     local output = kp*_error + (kp/ti)*integrative + kp * td*((_error - last_error)/delta_t)
     last_error = _error
@@ -1041,9 +1043,9 @@ function airutils.add_blast_damage(pos, radius, damage_cal)
                         damage_groups = {fleshy = damage},
                     }, nil)
 				end
-				for _, item in pairs(entity_drops) do
+				--[[for _, item in pairs(entity_drops) do
 					add_drop(drops, item) -- !!! accessing undefined variable add_drop, drops
-				end
+				end]]--
 			end
 
         end
diff --git a/physics_lib.lua b/physics_lib.lua
index e25d201..3b8a126 100755
--- a/physics_lib.lua
+++ b/physics_lib.lua
@@ -174,7 +174,7 @@ function airutils.stepfunc(self,dtime,colinfo)
 	if self.logic then
 		if self.view_range then self:sensefunc() end
 		self:logic()
-		execute_queues(self) -- !!! accessing undefined variable execute_queues
+		--execute_queues(self)
 	end
 
 	self.lastvelocity = self.object:get_velocity()
diff --git a/pilot_skin_manager.lua b/pilot_skin_manager.lua
index 8ebda7a..84b0f04 100644
--- a/pilot_skin_manager.lua
+++ b/pilot_skin_manager.lua
@@ -97,11 +97,11 @@ function airutils.set_player_skin(player, skin)
         else
             --remove texture
             local old_texture = player_meta:get_string("backup")
-            if set_skin then -- !!! accessing undefined variable set_skin
+            if set_skin then --checking if set_skin is available (not using an optional dependency, just checking if it exists)
                 if player:get_attribute("set_skin:player_skin") ~= nil and player:get_attribute("set_skin:player_skin") ~= "" then
                     old_texture = player:get_attribute("set_skin:player_skin")
                 end
-            elseif wardrobe then
+            elseif wardrobe then --checking if wardrobe is available (not using an optional dependency, just checking if it exists)
                 if wardrobe.playerSkins then
                     if wardrobe.playerSkins[name] ~= nil then
                         old_texture = wardrobe.playerSkins[name]