# Material Functions

**URL:** <https://forums.unrealengine.com/t/material-functions/7577>\
**Category:** Rendering\
**Tags:** unreal-engine\
**Created:** [July 14, 2014, 7:34pm UTC](https://forums.unrealengine.com/t/material-functions/7577 "2014-07-14T19:34:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Decorix](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Decorix](https://forums.unrealengine.com/u/Decorix)\
**Post date:** [July 14, 2014, 7:34pm UTC](https://forums.unrealengine.com/t/material-functions/7577/1 "2014-07-14T19:34:57Z")

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Hi all,

I’m currently working on a new landscape material based on a tutorial.

Which uses a Materialfunction. In my previous landscape material I had the  
possibilty to adjust parameters on the fly using a instance. For eg… scaling UVs  
of my rocks,grass, or distance blend falloff, NormalIntensity,etc.

Now with this Materialfunction which consist of only texture setup I would  
like to build in more parameters. But you can’t even add scaler parameter.

My question do you build parameters out side material function?

Thanks in advanced

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**Author:** ![Jacky](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jacky/32/918690_2.png) [@Jacky](https://forums.unrealengine.com/u/Jacky)\
**Post date:** [July 14, 2014, 7:39pm UTC](https://forums.unrealengine.com/t/material-functions/7577/2 "2014-07-14T19:39:56Z")

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Which material function did the tutorial use? Material functions shouldnt prevent you from having scalar or vector parameters really.

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**Author:** ![Skynet](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skynet](https://forums.unrealengine.com/u/Skynet)\
**Post date:** [July 14, 2014, 10:20pm UTC](https://forums.unrealengine.com/t/material-functions/7577/3 "2014-07-14T22:20:19Z")

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Maybe a “Function Input” is what you are looking for.

Here is an example:

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>
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Especially these pictures should explain the use of a Function Input:  
[![](https://d3ar1piqh1oeli.cloudfront.net/4/4e/ChromGraph_MatLayTut.png/940px-ChromGraph_MatLayTut.png) ](https://d3ar1piqh1oeli.cloudfront.net/4/4e/ChromGraph_MatLayTut.png/940px-ChromGraph_MatLayTut.png)  
[![](https://d3ar1piqh1oeli.cloudfront.net/6/61/SnowCoveredChromeNetwork_MatLayTut.png/940px-SnowCoveredChromeNetwork_MatLayTut.png) ](https://d3ar1piqh1oeli.cloudfront.net/6/61/SnowCoveredChromeNetwork_MatLayTut.png/940px-SnowCoveredChromeNetwork_MatLayTut.png)

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<div class="post-metadata">

**Author:** ![Decorix](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Decorix](https://forums.unrealengine.com/u/Decorix)\
**Post date:** [July 15, 2014, 10:34am UTC](https://forums.unrealengine.com/t/material-functions/7577/4 "2014-07-15T10:34:43Z")

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Thanks alot for the info.

I’ve looked into Materialfunctions a bit more, but i’m still struggeling. I have instanced my material and my Rock\_Normal\_Scale parameters are showing up, but  
changing the values isn’t doing much ☹ Does anybody see anyting strange? Thanks

 ![Material_setup.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/3X/1/4/144f386a530d6e1fec2c182f83ffce60db36eecf.jpeg)