Question 'metaInput' missing semantics

After upgrading from 7.7.1 to 12.1.2, some of my custom shaders have the following error:

'UniversalFragmentMeta': input parameter 'metaInput' missing semantics (UniversalMetaPass.hlsls:37)

"metaInput" is of type MetaInput, and going into MetaInput.hlsl reveals it is an alias for UnityMetaInput, which itself is a struct with no semantics. But these are all directly from URP 12.1.2's own original files with no modifications. What could be wrong?

 

I have the same issue, shaders that worked fine in Unity 2019 are now broken in Unity 2021

Any idea why this many happen ? The meta pass is very simple

 

I think this is a bug of unity engine, but i don't know how to fixed it.

 

if u use urp version 12 or later,in shader file change this:

Code (CSharp):

1. #pragma vertex UniversalVertexMeta
2. #pragma fragment UniversalFragmentMetaLit

eg:not use
UniversalFragmentMeta
but use
UniversalFragmentMetaLit
error will disappear.

 

I think we should see the struct metaInput, if there is a variable in it we are using it.

 

I had to put this all on hold for a long time, but now that I've come back to it, this solution worked. Thanks!

 

Thank you so much!

 

Thanks for that!!!!!!!!!! i just love you

 

thanks. worked here