# Matchbox shader builder

**URL:** <https://forum.logik.tv/t/matchbox-shader-builder/4006>\
**Category:** Flame Questions\
**Tags:** matchbox\
**Created:** [October 10, 2021, 2:59pm UTC](https://forum.logik.tv/t/matchbox-shader-builder/4006 "2021-10-10T14:59:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![vkastrup](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/vkastrup/32/13015_2.png) [@vkastrup](https://forum.logik.tv/u/vkastrup)\
**Post date:** [October 10, 2021, 2:59pm UTC](https://forum.logik.tv/t/matchbox-shader-builder/4006/1 "2021-10-10T14:59:59Z")

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Hi,  
Maybe someone here can give me a hint.  
I was trying to build a shader, but the shaderbuilder kept failing, giving me this error:

ERROR : Compiling shaders requires a valid Display

I thought something was wrong with my shader, but tried building one of the examples in /matchbox/shaders/EXAMPLES/ and get the same.  
can’t really find any info using google.  
i’m on a mac.

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**Author:** ![ManChicken](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/manchicken/32/233_2.png) [@ManChicken](https://forum.logik.tv/u/ManChicken)\
**Post date:** [October 10, 2021, 5:35pm UTC](https://forum.logik.tv/t/matchbox-shader-builder/4006/2 "2021-10-10T17:35:49Z")

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Try doing `export DISPLAY=:0` in the terminal first, then running shader\_builder with your arguments and see if that gets you anywhere.

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**Author:** ![vkastrup](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/vkastrup/32/13015_2.png) [@vkastrup](https://forum.logik.tv/u/vkastrup)\
**Post date:** [October 10, 2021, 8:37pm UTC](https://forum.logik.tv/t/matchbox-shader-builder/4006/3 "2021-10-10T20:37:09Z")

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Thanks. Will give it a try.

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<div class="post-metadata">

**Author:** ![vkastrup](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/vkastrup/32/13015_2.png) [@vkastrup](https://forum.logik.tv/u/vkastrup)\
**Post date:** [October 10, 2021, 8:40pm UTC](https://forum.logik.tv/t/matchbox-shader-builder/4006/4 "2021-10-10T20:40:02Z")

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Perfect. Thanks.