Too late? ;) I rebuilt the window manager from the ground up. This window manager is built 100% by me. Hopefully this window manager is much more bug free and performant. Now, only a single sprite runs every window. Other sprites add elements onto each window. This will drastically reduce block count. If possible, find ways to reduce the block count even further. FYI the window is completely compatible with rounded corners and gradients, and the outline is optional. I created the windows like this to demonstrate the Microsoft Windows style. I also did not include stamping/pen support to avoid complexity. I can add it another time. To be honest, I'm not sure if we're actually going to be using this. And that's fine because I only spent 2 days on this. Enjoy!