Something changed !

res/shaders/raytracing/Callable.slang

@@ -24,5 +24,5 @@ void callable(inout CallablePayload payload)
     // gamma correction
     result = result / (result + float3(1.0));
     result = pow(result, float3(1.0/2.2));
-    payload.color = float3(0, 0, 1);
+    payload.color = result;
 }

res/shaders/raytracing/ClosestHit.slang

@@ -37,7 +37,7 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
     CallablePayload callable;
     callable.params = params;
 
-    CallShader(0, callable);
+    CallShader(InstanceID(), callable);
 
-    hitValue.color = float3(0, 1, 1) + callable.color;
+    hitValue.color = float3(1, 0, 0);
 }