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-.DS_Store
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+.DS_Store
+*.swf
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@@ -7,4 +7,14 @@ This is modded version of AlternativaEditor (Tanks map editor)
 ## Notice
 This editor is still under development, and doesn't support some features that were in the original version. It mainly caused by 3D engine upgrade.
 So here is the list of what is not supported yet:
-- Selecting props on the map by clicking on them
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+- Selecting props on the map by clicking on them
+
+## How to build
+Project is configured to compile in VS Code with [ActionScript & MXML](https://marketplace.visualstudio.com/items?itemName=bowlerhatllc.vscode-as3mxml) Plugin.
+
+You will need Flex 4.9 + AIR 51 SDK
+Here are the steps how to make it:
+1. Download Apache Flex SDK Installer from the [official website](https://flex.apache.org/installer.html). Open the installer, select version 4.9.1, and download it.
+2. Download Adobe AIR+Flex SDK from [here](https://airsdk.harman.com/download). Here select option 'AIR SDK for Flex Developers - to be overlaid onto a Flex SDK'.
+3. Copy all files from AIR SDK into Flex SDK
+Done. Now select this combined SDK in VSCode and compile the project.
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