Observer camera screenshots crash the game under Direct3D.

[DreamyCecil]

If the screenshot resolution is set to higher than the monitor resolution, then the game crashes upon attempting to take them under the Direct3D graphics API but only when in Fullscreen window mode.

Steps to reproduce

1. Set graphics API to Direct3D and set the game to Fullscreen mode (not borderless or windowed).
2. Enter photo mode on any level and set the screenshot resolution to anything higher than your monitor resolution (e.g. 3840x2160 if your monitor is 1920x1080).
3. Take the screenshot using the shortcut key (F12 by default).