| Parameter | Description | 
|---|---|
| s | The RayTracingShader instance. | 
| shaderIndex | The callable Shader index for which to retrieve the parameter size. | 
int The parameter size in bytes.
Returns the parameter size of a user-defined callable Shader from within a RayTracingShader.
Additional resources: ShaderUtil.GetCallableShaderCount, ShaderUtil.GetCallableShaderName.