I am working on a project to make WebGL 2 code works on playcanvas. However, I meet this error.
Here is the project link. Someone helps me plz 
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Hi @kprimo,
I think you mean WebGL2 with GLSL 3 ES code. That’s a huge shader that you are trying to implement in Playcanvas from shadertoy.
Rarely it will work without changes. The error indicates there is a missing uniform somewhere which I can’t track it sorry. Usually the approach I take with this kind of shaders is build them line by line to make sure I don’t get any errors.
Start by adding all uniforms, then method by method until the main() method of the shader can execute with no errors thrown.
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Thanks for your reply. Actually I do have modified the shader code to make it won’t execute with errors(on shader). Finally I got this error 
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Here is the link of the shadertoy demo which I am trying to modify.
The shader code doesn’t reply errors now, thus I cannot find out where to debug.
found something about this: https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/uniform
wtf, I got it! The type is wrong when assigning a value to a variable named ‘uMouse’. I’m so stupid
! Now it runs well!
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Very cool. ShaderToy. Something else for me to try to find time for. :^)
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