internal void DetermineWorkflow(MaterialProperty[] props)
{
if (FindProperty("_SpecGlossMap", props, false) != null && FindProperty("_SpecColor", props, false) != null)
m_WorkflowMode = WorkflowMode.Specular;
else if (FindProperty("_MetallicGlossMap", props, false) != null && FindProperty("_Metallic", props, false) != null)
m_WorkflowMode = WorkflowMode.Metallic;
else
m_WorkflowMode = WorkflowMode.Dielectric;
}