function scr_marker_blend(arg0, arg1, arg2, arg3 = 1, 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_blend);
    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();
        blendmode = arg3;
    }
    if (arg11 > 0)
        scr_doom(thismarker, arg11);
    return thismarker;
}

function scr_afterimage_blend(arg0 = id, arg1 = 1, arg2 = 30)
{
    var _blendmarker = instance_create(arg0.x, arg0.y, obj_marker_blend);
    _blendmarker.sprite_index = arg0.sprite_index;
    _blendmarker.image_alpha = arg0.image_alpha;
    _blendmarker.image_angle = arg0.image_angle;
    _blendmarker.image_blend = arg0.image_blend;
    _blendmarker.image_index = arg0.image_index;
    _blendmarker.image_speed = arg0.image_speed;
    _blendmarker.image_xscale = arg0.image_xscale;
    _blendmarker.image_yscale = arg0.image_yscale;
    _blendmarker.mask_index = arg0.mask_index;
    _blendmarker.blendmode = arg1;
    with (_blendmarker)
        scr_lerpvar("image_alpha", image_alpha, 0, arg2);
    scr_doom(_blendmarker, arg2 + 1);
    return _blendmarker;
}