feat: new cell textures + unified texture for all cells

api.lua

@@ -689,13 +689,16 @@ end
 -- \param displayName Display name of cell
 -- \param node Node which can be picked up with this cell
 -- \returns nil
-industrialtest.api.registerStorageCell=function(name,displayName,node,modname)
+industrialtest.api.registerStorageCell=function(name,displayName,node,modname,color)
+	color = color or "#ffffffff"
 	if not modname then
 		modname="industrialtest"
 	end
 	minetest.register_craftitem("industrialtest:"..name.."_cell",{
 		description=S(displayName.." Cell"),
-		inventory_image=modname.."_"..name.."_cell.png",
+		inventory_image="industrialtest_cell_fluid.png",
+		inventory_overlay="industrialtest_cell_casing.png",
+		color=color,
 		on_place=function(itemstack,user,pointed)
 			if pointed.type~="node" or not user or not user:is_player() then
 				return nil