# Shaders, Questions

**URL:** <https://discourse.threejs.org/t/shaders-questions/51350>\
**Category:** Questions\
**Tags:** shaders\
**Created:** [May 8, 2023, 9:05pm UTC](https://discourse.threejs.org/t/shaders-questions/51350 "2023-05-08T21:05:26Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![asliCo](https://avatars.discourse-cdn.com/v4/letter/a/4af34b/32.png) [@asliCo](https://discourse.threejs.org/u/asliCo)\
**Post date:** [May 8, 2023, 9:05pm UTC](https://discourse.threejs.org/t/shaders-questions/51350/1 "2023-05-08T21:05:26Z")

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Couldn’t find any solution yet.  
 ![Screenshot 2023-05-08 at 22.02.00](https://canada1.discourse-cdn.com/flex035/uploads/threejs/original/3X/c/5/c5df0774d6dc740cbed9c4108232c2fcf406c7f2.png)

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**Author:** ![Harold](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/harold/32/32136_2.png) [@Harold](https://discourse.threejs.org/u/Harold)\
**Post date:** [May 8, 2023, 10:13pm UTC](https://discourse.threejs.org/t/shaders-questions/51350/2 "2023-05-08T22:13:47Z")

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Perhaps a codepen or fiddle? This says nothing.

Title is misleading. I see no shader, nor any question. 🤔

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**Author:** ![dubois](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@dubois](https://discourse.threejs.org/u/dubois)\
**Post date:** [May 9, 2023, 12:49am UTC](https://discourse.threejs.org/t/shaders-questions/51350/3 "2023-05-09T00:49:19Z")

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The compiler is complaining about missing functions. Your shader is calling `textureLod(...)` somewhere, but that method doesn’t exist.

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**Author:** ![Chaser\_Code](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/chaser_code/32/20199_2.png) [@Chaser\_Code](https://discourse.threejs.org/u/Chaser_Code)\
**Post date:** [May 9, 2023, 5:34am UTC](https://discourse.threejs.org/t/shaders-questions/51350/4 "2023-05-09T05:34:54Z")

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Maybe map or uv are abscent.  
Code: `textureLod(map,vUv,0.0);`

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**Author:** ![Mugen87](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/mugen87/32/5645_2.png) [@Mugen87](https://discourse.threejs.org/u/Mugen87)\
**Post date:** [May 9, 2023, 8:53am UTC](https://discourse.threejs.org/t/shaders-questions/51350/5 "2023-05-09T08:53:47Z")

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What version of `three.js` are you using?

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**Author:** ![asliCo](https://avatars.discourse-cdn.com/v4/letter/a/4af34b/32.png) [@asliCo](https://discourse.threejs.org/u/asliCo)\
**Post date:** [May 9, 2023, 9:28am UTC](https://discourse.threejs.org/t/shaders-questions/51350/6 "2023-05-09T09:28:19Z")

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It’s “three”: 0.152.2

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**Author:** ![Mugen87](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/mugen87/32/5645_2.png) [@Mugen87](https://discourse.threejs.org/u/Mugen87)\
**Post date:** [May 9, 2023, 9:30am UTC](https://discourse.threejs.org/t/shaders-questions/51350/7 "2023-05-09T09:30:35Z")

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Do you mind demonstrating the issue with a fiddle? [three.js dev template - module - JSFiddle - Code Playground](https://jsfiddle.net/g3atw6k5/)