Custom Node : "Internal error communicating with the shader compiler process."

Unity Engine
, ,
1

Hello,

I’m working on an Interior Mapping shader, and need to use several Cubemaps to avoid repetitiveness.
Sampling 4 cubemaps then giving their output a different weight before adding them does work.
However I would like to avoid sampling 4 times when I only end up using one of them.

I made a custom node for that, but Shadergraph throw the following errors :
, Fragment Program: Internal error communicating with the shader compiler process
and
Internal error communicating with the shader compiler process.

void PickChosenCubemap_float
(
    //In   
    UnityTextureCube A,
    UnityTextureCube B,
    UnityTextureCube C,
    UnityTextureCube D,
    float Value,

    //Out
    out UnityTextureCube Chosen
)
{
    //Default
    Chosen = A;
  
    //Pick only one cubemap to continue the calculations
    if(Value > 0.75f)
    {
        Chosen = D;
    }
    else if(Value > 0.5f)
    {
        Chosen = C;
    }
    else if(Value > 0.25f)
    {
        Chosen = B;
    }   
}

Is this an actual bug, or something expected with HLSL code ? And if so, what’s the proper way to do it ?
I know conditional behavior is tricky for GPU compilers, but this code doesn’t really seems extravagant.
I’ve tested it both with HDRP/Shadergraph 10.3.2 and 10.4

2

So … do I bother with a bug report or should I just give up on doing this with ShaderGraph ?