Fixed T buy zone

README.md

@@ -2,6 +2,42 @@
 
 An open source CS:GO map.
 
-Custom materials used in this map are available inside the materials folder. 
+Custom materials used in this map are available inside the materials folder. Do not forget to install them before attempting to compile it through Valve Hammer Editor.
 
-Do not forget to install them before attempting to compile it through Valve Hammer Editor.
+## Getting the map
+
+Build the map or download the [latest release](https://git.quent1.fr/quent1/de_abandoned_hospital/releases).
+
+## Building the map
+
+Open `de_abandoned_hospital.vmf` with Valve Hammer Editor (Counter Strike : Global Offensive SDK version). Press `F9` to compile, then select `Expert...` and choose the `Full compile -both -final (slow)` preset. Compilation will be way slower but it will ensure that the lightning of static props on the map are correctly rendered. 
+
+Once installed, do not forget to generate the navigation meshes file.
+
+## Generating the navigation meshes file
+
+Open CS:GO console and execute : 
+
+	map de_abandoned_hospital
+	sv_cheats 1
+	nav_generate
+	
+Now that the standard mesh file is generated, we need to check for missing floors (upper floors and ladders). See this [Valve wiki page](https://developer.valvesoftware.com/wiki/Navigation_Meshes#Explicitly_marking_walkable_areas_.28i.e:_.22There.27s_no_mesh_upstairs.22.29) for more details.
+
+To do so, execute the following commands :
+
+	sv_cheats 1
+	nav_edit 1
+	
+To mark a floor as walkable, execute :
+
+	nav_mark_walkable
+	
+Once all floors are marked as walkable, rebuild the navigation meshes file :
+
+	nav_generate
+	
+If the meshes are correctly generated, add all ladders then save the file :
+
+	nav_build_ladder
+	nav_save