# Multi-texture OBJ

**URL:** https://discourse.vtk.org/t/multi-texture-obj/3775
**Category:** Support
**Created:** [July 14, 2020, 10:49pm UTC](https://discourse.vtk.org/t/multi-texture-obj/3775 "2020-07-14T22:49:37Z")
**Posts on this page:** 1
**Showing post:** 13

<div class="post-metadata">

### Author: ![panicbuttonvfx](https://discourse.vtk.org/user_avatar/discourse.vtk.org/panicbuttonvfx/32/1838_2.png) [@panicbuttonvfx](https://discourse.vtk.org/u/panicbuttonvfx)
#### Post date: [July 21, 2020, 3:08pm UTC](https://discourse.vtk.org/t/multi-texture-obj/3775/13 "2020-07-21T15:08:02Z")

</div>

Because of the need of using additive blending to map multiple textures, if the background is not black the brightness of the texture changes:  
 ![image](https://discourse.vtk.org/uploads/default/original/2X/6/65fafb0b2efe3c3c3b147b83ef33023ce990b0a2.jpeg)

If the background is black, the texture brightness remains as expected:  
 ![image](https://discourse.vtk.org/uploads/default/original/2X/4/4654e0010f9940695c40730e67a498096cb92eb2.png)

The issue is that when mapping the first texture it seems to add some color beyond the edges of the texture (dark blue/gray color):  
 ![image](https://discourse.vtk.org/uploads/default/original/2X/f/f3753d2d5d915be7f499d2e18c7bab940448d447.png)

I’ve tried using `InterpolateOn()` on the texture, and that color got darker (the color shown above), but just a bit. Is there a way to set the behavior of the texture so beyond the mapped areas the background color can be set to black?

Thanks!

---

_[View the full topic](https://discourse.vtk.org/t/multi-texture-obj/3775)._