title: Pow function vs lookup texture in shader
body: <p>I'm developing for the XBOX 360, and I use the pow() intrinsic in some lighting calculations.</p>
  
  <p>6-8 years ago it <a href="http://www.gamasutra.com/view/feature/2972/a_noninteger_power_function_on_.php?page=1" rel="nofollow">used to be common</a> to use a 1D lookup texture to approximate pow(). Does anyone still do that?</p>
  
  <p>Is it worth trying this for the 6 year old XBOX 360, or is it unlikely to improve performance?</p>