# Question when rendering two vti files in Paraview

**URL:** https://discourse.paraview.org/t/question-when-rendering-two-vti-files-in-paraview/2667
**Category:** ParaView Support
**Tags:** python
**Created:** [October 2, 2019, 8:26am UTC](https://discourse.paraview.org/t/question-when-rendering-two-vti-files-in-paraview/2667 "2019-10-02T08:26:32Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![rjsgml5698](https://discourse.paraview.org/user_avatar/discourse.paraview.org/rjsgml5698/32/2119_2.png) [@rjsgml5698](https://discourse.paraview.org/u/rjsgml5698)
#### Post date: [October 2, 2019, 8:26am UTC](https://discourse.paraview.org/t/question-when-rendering-two-vti-files-in-paraview/2667/1 "2019-10-02T08:26:32Z")

</div>

Hello. I have a question.(First of all, please understand my lack of English)

When rendering two vtk files in paraview, I can recognize the relative position of the objects. As follows.

[front]  
 ![image](https://discourse.paraview.org/uploads/default/original/2X/2/2468c3716de3391c930728ce15280466b93e137e.png)  
[Back]  
 ![image](https://discourse.paraview.org/uploads/default/original/2X/e/ee3c7aa6e5a1c8a644c3dc86e23696d50820cd54.png)

So I can recognize whether the white object is on the front or the back.

However, when two different vti files overlap, the relative position seems to be ambiguous. As follows.

![image](https://discourse.paraview.org/uploads/default/original/2X/c/c2403a1a56ebc254289e0d26a4aaa7d1405455f6.jpeg)

![image](https://discourse.paraview.org/uploads/default/original/2X/1/1ea3048b9515a3de0fea5b18e52bffc5ca1aca08.jpeg)

In the direction of the arrow, B is the front.  
But it still looks like A is at the beginning(Bottom picture). I want to know what is the reason for this.

I would really appreciate it if you let me know.