Large transparent UI panel and performances.

Hello,

I am developing a 3D game for mobile platforms for more than a year and I finally arrived to beta testing.

The performances on my Android device are fine (60FPS) with some 3D elements displayed but when navigating in the menus I use a 100% by 100% semi transparent black image between the game view and the actual UI to block raycasts. When this panel is displayed, the FPS drop to 30. I guess that it comes from the rendering of the scene through the large transparent layer.

> Is there a way to limit the FPS drop ?
> If not, is it possible to block the raycasts without using an UI image ? (and use a camera filter for the 50% black effect)

Thank you in advance