Hi, I have a problem with my shadows.
Game is in Fullscreen mode. When I call the Task manager the game will minimize. After that I click on the Button down the desktop to maximize (switch back to) the Game again, but then the shadows have graphic failures. I can handle out the problem if I restart the shadows. But how does I know if the Gamer switched back to the game? I know the on_maximize, but its just working in Window mode.

I use window_focus to test it. save the focus state in each frame in a variable, if it changes in next frame switch on/off shadowmapping.

hm window_focus is good, but its also set to 1 if the Game is preselected on the taskbar but not opened. Then a crash happens.

I used it sometimes with && mouse_valid

yes, I thought also in this way. But the Player have to move the mouse for that a little. I hoped that I could find a better way for that, But its ok, I will do it as this!! Thank you Sivan for your help!!