# White lines on screen (SOLVED)

**URL:** <https://forum.defold.com/t/white-lines-on-screen-solved/6644>\
**Category:** Questions\
**Created:** [March 22, 2017, 3:38pm UTC](https://forum.defold.com/t/white-lines-on-screen-solved/6644 "2017-03-22T15:38:52Z")\
**Posts on this page:** 1\
**Showing post:** 19

<div class="post-metadata">

**Author:** ![britzl](https://forum-defold.b-cdn.net/user_avatar/forum.defold.com/britzl/32/23_2.png) [@britzl](https://forum.defold.com/u/britzl)\
**Post date:** [March 29, 2017, 7:41pm UTC](https://forum.defold.com/t/white-lines-on-screen-solved/6644/19 "2017-03-29T19:41:30Z")

</div>

> [@electrosanford](#):
>
> Is it better to just change the Z values for backgrounds?

Better than what? You should use the z-value to control the order in which sprites and other things are drawn. Remember that the default render script has a z-range from -1 to 1. Make a copy and increase this so you get a bit more flexibility and don’t have to mess with fractional z-values.

You should also keep in mind how the number of draw calls are affected by how you interleave components based on z-value. Kingster @Mattias_Hedberg has [written an excellent summary in this article](https://forum.defold.com/t/draw-calls-and-defold/4674).

---

_[View the full topic](https://forum.defold.com/t/white-lines-on-screen-solved/6644)._