# Bug in Node Material Editor? **URL:** \ **Category:** Bugs\ **Created:** [February 14, 2025, 7:56pm UTC](https://forum.babylonjs.com/t/bug-in-node-material-editor/56587 "2025-02-14T19:56:08Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![forux](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/forux/32/36392_2.png) [@forux](https://forum.babylonjs.com/u/forux)\ **Post date:** [February 14, 2025, 7:56pm UTC](https://forum.babylonjs.com/t/bug-in-node-material-editor/56587/1 "2025-02-14T19:56:08Z")
> **[Babylon.js Node Material Editor](https://nodematerial-editor.babylonjs.com/#GA5Q4F%2356)** > > Babylon.js Node material editor - shader-based materials editor for Babylon.js I am trying to understand why it generates next. I have no idea so far, can you please help me? ```auto 20:55:26: Node material build successful 20:55:26: Shader compilation error: FRAGMENT SHADER ERROR: 0:576: 'globalWorldPos' : undeclared identifier ERROR: 0:576: 'assign' : l-value required (can't modify a const) ERROR: 0:576: '=' : dimension mismatch ERROR: 0:576: 'assign' : cannot convert from 'highp 3-component vector of float' to 'const highp float' ERROR: 0:577: 'globalWorldNormal' : undeclared identifier ERROR: 0:577: 'output3' : undeclared identifier ERROR: 0:577: 'xyz' : field selection requires structure, vector, or interface block on left hand side ERROR: 0:577: 'assign' : l-value required (can't modify a const) ERROR: 0:578: 'globalWorldNormal' : undeclared identifier WARNING: 0:578: 'normalize' : operation result is undefined for the values passed in ERROR: 0:578: '=' : dimension mismatch ERROR: 0:578: '=' : cannot convert from 'const highp float' to 'highp 4-component vector of float' ERROR: 0:579: 'globalWorldPos' : undeclared identifier ERROR: 0:579: 'xyz' : field selection requires structure, vector, or interface block on left hand side 20:55:26: Shader compilation error: FRAGMENT SHADER ERROR: 0:576: 'globalWorldPos' : undeclared identifier ERROR: 0:576: 'assign' : l-value required (can't modify a const) ERROR: 0:576: '=' : dimension mismatch ERROR: 0:576: 'assign' : cannot convert from 'highp 3-component vector of float' to 'const highp float' ERROR: 0:577: 'globalWorldNormal' : undeclared identifier ERROR: 0:577: 'output3' : undeclared identifier ERROR: 0:577: 'xyz' : field selection requires structure, vector, or interface block on left hand side ERROR: 0:577: 'assign' : l-value required (can't modify a const) ERROR: 0:578: 'globalWorldNormal' : undeclared identifier WARNING: 0:578: 'normalize' : operation result is undefined for the values passed in ERROR: 0:578: '=' : dimension mismatch ERROR: 0:578: '=' : cannot convert from 'const highp float' to 'highp 4-component vector of float' ERROR: 0:579: 'globalWorldPos' : undeclared identifier ERROR: 0:579: 'xyz' : field selection requires structure, vector, or interface block on left hand side ``` ---
**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\ **Post date:** [February 17, 2025, 8:33am UTC](https://forum.babylonjs.com/t/bug-in-node-material-editor/56587/2 "2025-02-17T08:33:20Z")
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**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\ **Post date:** [February 17, 2025, 9:20am UTC](https://forum.babylonjs.com/t/bug-in-node-material-editor/56587/3 "2025-02-17T09:20:07Z")
This PR will fix the problem: > > > See https://forum.babylonjs.com/t/bug-in-node-material-editor/56587 > > cc @delta…kosh, because this PR also rollbacks the changes from #15434. ---
**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\ **Post date:** [February 17, 2025, 9:20am UTC](https://forum.babylonjs.com/t/bug-in-node-material-editor/56587/4 "2025-02-17T09:20:11Z")