# Nextjs App Animation Using ShaderToy Example not displaying on iOS

**URL:** <https://discourse.threejs.org/t/nextjs-app-animation-using-shadertoy-example-not-displaying-on-ios/57083>\
**Category:** Questions\
**Tags:** shadertoy, buffers, textures, threejs, shaders\
**Created:** [October 16, 2023, 10:08pm UTC](https://discourse.threejs.org/t/nextjs-app-animation-using-shadertoy-example-not-displaying-on-ios/57083 "2023-10-16T22:08:08Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![webdot](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/webdot/32/41000_2.png) [@webdot](https://discourse.threejs.org/u/webdot)\
**Post date:** [October 16, 2023, 10:08pm UTC](https://discourse.threejs.org/t/nextjs-app-animation-using-shadertoy-example-not-displaying-on-ios/57083/1 "2023-10-16T22:08:09Z")

</div>

Hello guys!

I was able to port [this shadertoy example](https://www.shadertoy.com/view/XtGcDK) to a next js app component (sandbox example [here](https://codesandbox.io/p/sandbox/elated-fermat-6xm8qm)) with the help of [this discussion](https://discourse.threejs.org/t/help-porting-shadertoy-to-threejs/2441). Everything seems to work fine on all devices except iOS devices.

The original shadertoy example also doesn’t show on iOS devices. It just dsplays a black screen. Same thing with the discussion example I followed. I would like to know if there is a way to fix this and if this has to do with the buffers.

Thanks!