var _sw = surface_get_width(application_surface);
var _sh = surface_get_height(application_surface);
if (!surface_exists(surf))
    surf = surface_create(_sw, _sh);
surface_set_target(surf);
draw_clear_alpha(c_black, 0);
draw_surface(application_surface, 0, 0);
surface_reset_target();
shader_replace_simple_set_hook(shader);
shader_set_uniform_f(u_time, time);
shader_set_uniform_f(u_aber, aberration);
var _multiplier = (global.darkzone == 0) ? 0.5 : 1;
draw_surface_ext(surf, camerax(), cameray(), _multiplier, _multiplier, 0, c_white, alpha);
shader_replace_simple_reset_hook();