I have had a few questions about the map layers from a few members and I realized after all this time, I did not know much about a few of them. I made a test map with all the layers and found a few things out, xxxxxx being the map name. The first thing that I found was that the CitiesXL MapEditor creates a wrongly named file. CitiesXL MapEditor creates xxxxxx_01_sim_gembeach_beach.png when a file is selected for the beach resource. This file is not listed in the mapmgr_xxxxxx_01.lua file. It should be named xxxxxx_01_Sim_SeaSide.png. The file xxxxx_01_Sim_SeaSide is for the American houses and the pier. Not sure of any other mods. The file containing the word gembeach should be called xxxxxx_01_gembeach_beach if it is used. I created this file for my test map but could not find any mod using the gembeach layer. The file xxxxxx_01_sim_environment is for the holiday hotels. The Holiday hotels under the hotel menu needed this layer. I also noticed three hotels in the beach menu needing this layer. Water, Agri and Oil layers work OK as we all know. Citylinks work OK. Not sure if any mod uses the waterway layer yet. I enabled the xxxxxx_01_sim_snow layer but it did not show when selecting the snow houses/buildings or snow field stuff. The fishing layer we know is not used yet.