Question How to set Unity Matrices for Instancing Indirect?

Hello,

I'm writting a custom shader from the shader graph's generated code to enable instancing indirect.
However, the unity_WorldToObject and unity_ObjectToWorld matrices were replaced by UNITY_MATRIX_I_M and UNITY_MATRIX_M, and now they are const.
How could I replace theirs values?

Edit:
Seems that we cant set the matrices anymore.

Code (CSharp):

1. // Define Model Matrix Macro
2. // Note: In order to be able to define our macro to forbid usage of unity_ObjectToWorld/unity_WorldToObject
3. // We need to declare inline function. Using uniform directly mean they are expand with the macro
4. float4x4 GetRawUnityObjectToWorld() { return unity_ObjectToWorld; }
5. float4x4 GetRawUnityWorldToObject() { return unity_WorldToObject; }
6.  
7. #define UNITY_MATRIX_M     ApplyCameraTranslationToMatrix(GetRawUnityObjectToWorld())
8. #define UNITY_MATRIX_I_M   ApplyCameraTranslationToInverseMatrix(GetRawUnityWorldToObject())
9.  
10. // To get instanding working, we must use UNITY_MATRIX_M / UNITY_MATRIX_I_M as UnityInstancing.hlsl redefine them
11. #define unity_ObjectToWorld Use_Macro_UNITY_MATRIX_M_instead_of_unity_ObjectToWorld
12. #define unity_WorldToObject Use_Macro_UNITY_MATRIX_I_M_instead_of_unity_WorldToObject

(Full Code: https://github.com/Unity-Technologi...on/Runtime/ShaderLibrary/ShaderVariables.hlsl")

Edit:
Probably we must now set the matrices array (e.g. unity_ObjectToWorldArray), just need figure out how. (Code: https://github.com/Unity-Technologi...lines.core/ShaderLibrary/UnityInstancing.hlsl)

Edit:
I`m setting the procedural setup method with:

#pragma instancing_options procedural:terrain_instancing_setup

And trying to access:

void terrain_instancing_setup()

{

   #if defined(UNITY_PROCEDURAL_INSTANCING_ENABLED)

       float4x4 m = unity_WorldToObjectArray[unity_InstanceID];

   #endif

}

However this error is occurring:
"undeclared identifier 'unity_WorldToObjectArray'"

Does anyone know what I'm missing?

 

I have basically the same problem right now. Did you ever find a solution for your problem? I can't seem to modify unity_ObjectToWorld in any case, although I see example projects online doing it.