# Wave Shader Compilation error **URL:** \ **Category:** Bugs\ **Tags:** material, shader\ **Created:** [April 16, 2021, 1:11pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062 "2021-04-16T13:11:37Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Manas\_Gangwani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/manas_gangwani/32/14448_2.png) [@Manas\_Gangwani](https://forum.babylonjs.com/u/Manas_Gangwani)\ **Post date:** [April 16, 2021, 1:11pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/1 "2021-04-16T13:11:37Z")
So I was trying to setup a simple wave shader and trying to render it on a plane. Was not trying to do a lot just wanted the plane to give that wave effect. I am getting an ‘unable to compile effect’ on the material. The shader code looks alright but it looks I am missing something when I am setting up the shader material. Playgorund link - [https://playground.babylonjs.com/#5IAHHK#5](https://playground.babylonjs.com/#5IAHHK#5) ---
**Author:** ![Cedric](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/cedric/32/2742_2.png) [@Cedric](https://forum.babylonjs.com/u/Cedric)\ **Post date:** [April 16, 2021, 1:53pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/2 "2021-04-16T13:53:17Z")
Press F12 to get the console and you should see that: ```auto babylon.js:16 BJS - [15:51:47]: Offending line [125] in vertex code: float output4 = output5 / wavelength; babylon.js:16 BJS - [15:51:47]: Error: VERTEX SHADER ERROR: 0:125: 'wavelength' : undeclared identifier ERROR: 0:133: 'u_World' : undeclared identifier ``` ---
**Author:** ![Manas\_Gangwani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/manas_gangwani/32/14448_2.png) [@Manas\_Gangwani](https://forum.babylonjs.com/u/Manas_Gangwani)\ **Post date:** [April 16, 2021, 2:05pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/3 "2021-04-16T14:05:21Z")
Ok I fixed the above errors. Also I don’t seem to be getting these errors on my console [https://playground.babylonjs.com/#5IAHHK#7](https://playground.babylonjs.com/#5IAHHK#7) ---
**Author:** ![Cedric](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/cedric/32/2742_2.png) [@Cedric](https://forum.babylonjs.com/u/Cedric)\ **Post date:** [April 16, 2021, 2:07pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/4 "2021-04-16T14:07:16Z")
```auto BJS - [16:06:49]: Error: FRAGMENT varying vUV does not match any VERTEX varying ``` ---
**Author:** ![Manas\_Gangwani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/manas_gangwani/32/14448_2.png) [@Manas\_Gangwani](https://forum.babylonjs.com/u/Manas_Gangwani)\ **Post date:** [April 16, 2021, 2:13pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/5 "2021-04-16T14:13:56Z")
ok some progress. looks like I am missing a library. Any idea what it is? [https://playground.babylonjs.com/#5IAHHK#8](https://playground.babylonjs.com/#5IAHHK#8) ---
**Author:** ![Cedric](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/cedric/32/2742_2.png) [@Cedric](https://forum.babylonjs.com/u/Cedric)\ **Post date:** [April 16, 2021, 2:17pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/6 "2021-04-16T14:17:34Z")
viewProjection missing from uniform list [wave shader | Babylon.js Playground](https://playground.babylonjs.com/#5IAHHK#9) ---
**Author:** ![Manas\_Gangwani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/manas_gangwani/32/14448_2.png) [@Manas\_Gangwani](https://forum.babylonjs.com/u/Manas_Gangwani)\ **Post date:** [April 16, 2021, 2:20pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/7 "2021-04-16T14:20:58Z")
ohh my bad. thanks a lot. We have something at least. The result is different than what I saw in the node material editor. [https://nodematerial-editor.babylonjs.com/#XB44SA](https://nodematerial-editor.babylonjs.com/#XB44SA) Thanks a lot anyway. I will explore further ---
**Author:** ![Manas\_Gangwani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/manas_gangwani/32/14448_2.png) [@Manas\_Gangwani](https://forum.babylonjs.com/u/Manas_Gangwani)\ **Post date:** [April 16, 2021, 3:42pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/9 "2021-04-16T15:42:30Z")
sorry to annoy you once again. I exported the shader after adding a texture in the node material and am running into new issues now. Apologies I am not super familiar with shaders [https://playground.babylonjs.com/#5IAHHK#16](https://playground.babylonjs.com/#5IAHHK#16) Node material - [https://nodematerial-editor.babylonjs.com/#XB44SA#1](https://nodematerial-editor.babylonjs.com/#XB44SA#1) ---
**Author:** ![Cedric](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/cedric/32/2742_2.png) [@Cedric](https://forum.babylonjs.com/u/Cedric)\ **Post date:** [April 16, 2021, 3:47pm UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/10 "2021-04-16T15:47:30Z")
Did you know you can use an NME shader directly using snippet without copy/paste shader: [Node Material | Babylon.js Documentation](https://doc.babylonjs.com/divingDeeper/materials/node_material/nodeMaterial#loading-from-a-snippet-unique-url) ---
**Author:** ![Manas\_Gangwani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/manas_gangwani/32/14448_2.png) [@Manas\_Gangwani](https://forum.babylonjs.com/u/Manas_Gangwani)\ **Post date:** [April 17, 2021, 7:56am UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/12 "2021-04-17T07:56:35Z")
Ok yes that worked. But is there no way to run it with the shader exported ---
**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:** [April 17, 2021, 9:03am UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/13 "2021-04-17T09:03:34Z")
The generated code is not meant to be used in a `ShaderMaterial`. See this thread for eg: [#include directives in shader code output from Node Material Editor - #2 by Evgeni\_Popov](https://forum.babylonjs.com/t/include-directives-in-shader-code-output-from-node-material-editor/10730/2) ---
**Author:** ![Manas\_Gangwani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/manas_gangwani/32/14448_2.png) [@Manas\_Gangwani](https://forum.babylonjs.com/u/Manas_Gangwani)\ **Post date:** [April 17, 2021, 9:31am UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/14 "2021-04-17T09:31:50Z")
yes I did change the uniforms in the shader code as well. Still getting the same issue. I guess it needs all of the NME wrapper code that you wrote That rgb issue is weird. [https://playground.babylonjs.com/#5IAHHK#20](https://playground.babylonjs.com/#5IAHHK#20) ---
**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:** [April 17, 2021, 9:54am UTC](https://forum.babylonjs.com/t/wave-shader-compilation-error/20062/15 "2021-04-17T09:54:38Z")
You miss a `#define VMAINUV` in each shader. It will work but without lighting. As explained in the post linked earlier, `ShaderMaterial` materials don’t support standard lighting out of the box.