title: openGL fixed function pipeline - scale texture intensity beyond 1.0
body: <p>is there a way other than multitexturing or multipass rendering to scale a texture's intensity above factor 1.0 using the fixed function pipeline?</p>
  
  <p>it can be achived with multipass rendering. for example factor 1.5 can be achieved by rendering the texture at full intensity once and then with color(0.5,0.5,0.5,1.0) a second time using additive blending.</p>
  
  <p>but is there also a way to achieve this with a single pass and without multitexturing?</p>