static string AddUsePasses(string code, FilterNames filter)
{
// Question mark makes it non-greedy....
// Matching: UsePass\s*\"ShadowSoftener.*?\"
return(Regex.Replace(code, SubShaderSearchString, string.Format("$1\n\tUsePass \"ShadowSoftener/{0}\"", filter.ToString().ToUpper())));
}
