An update is available on the beta branch. This will improve rendering speed of uncollapsed brushes in-game. You may also see a speed increase in the editor when viewing maps with lots of CSG brushes. You can read about this in detail in this thread.

Lunarovich's suggestion here has also been implemented.

I also tweaked a few stock prefabs and the FPS example map. The crates and boxes will now all use the dynamic shadow setting, and the red cage light prefab is set to only cast static shadows now. This prevents a lot of excessive shadow rendering in the big elevator room, since each point light requires six passes. You can see in the screenshot below the monsters aren't casting shadows from the red light on the right, but they are casting a shadow from the big overhead spotlight. It looks good and the performance is a lot more consistent now.

Don't forget we are scheduling a Google Hangout Saturday the 5th at 1:00 PM PST to review the release of Leadwerks Game Launcher.