Step-by-step instructions of how to retrieve the latest Irrlicht source code from the SVN (Subversion) source code server using TortoiseSVN (Windows):
1. Download Tortoise SVN from http://tortoisesvn.net and install it.
2. Create a new folder called "Subversion", example "C:\Subversion".
3. Open this folder.
4. Right-click anywhere in the folder and select "SVN Checkout".
5. In the popup box for "URL of repository" enter "https://svn.sourceforge.net:443/svnroot/irrlicht".
6. In the popup box for "Checkout Directory" *add* "\Irrlicht" to the path. Example "C:\Subversion\Irrlicht".
7. Click OK; the Irrlicht source will be downloaded into the "Irrlicht" folder.
8. To update the Irrlicht source at any time, simply *right-click* on the "C:\Subversion\Irrlicht" folder and select "SVN Update".
9. Made a nice modification, or fixed a bug, and want to contribute the code? Simply right-click on the Irrlicht folder and select "TortoiseSVN->create patch" - Tortoise will then create a patch file for you.