function scr_marker_fog(arg0, arg1, arg2, arg3 = 16777215, arg4 = 1, arg5 = 1, arg6 = 0, arg7 = 0, arg8 = 16777215, arg9 = depth, arg10 = false, arg11 = -1, arg12 = 1)
{
    var thismarker = instance_create(arg0, arg1, obj_marker_fog);
    with (thismarker)
    {
        depth = arg9;
        sprite_index = arg2;
        image_speed = arg6;
        image_xscale = arg4;
        image_yscale = arg5;
        image_index = arg7;
        image_blend = arg8;
        image_alpha = arg12;
        if (arg10)
            scr_depth_alt();
        color = arg3;
    }
    if (arg11 > 0)
        scr_doom(thismarker, arg11);
    return thismarker;
}

function scr_afterimage_fog(arg0 = id, arg1 = 16777215, arg2 = 30)
{
    var fog = instance_create(x, y, obj_marker_fog);
    fog.sprite_index = arg0.sprite_index;
    fog.image_alpha = arg0.image_alpha;
    fog.image_angle = arg0.image_angle;
    fog.image_blend = arg0.image_blend;
    fog.image_index = arg0.image_index;
    fog.image_speed = arg0.image_speed;
    fog.image_xscale = arg0.image_xscale;
    fog.image_yscale = arg0.image_yscale;
    fog.mask_index = arg0.mask_index;
    fog.color = arg1;
    with (fog)
        scr_lerpvar("image_alpha", image_alpha, 0, arg2);
    scr_doom(fog, arg2 + 1);
    return fog;
}