VSL: Testing an image for an alpha channel

[[EMAIL PROTECTED]]

Hi, is it possible to test for the prescence of an alpha channel in a
given image map inside a VSL material?

Something like:

Surface properties
{
  do stuff

  if (image has alpha)
  {
       Apply alpha channel of image to surface transparency
  }
}

I want to use the same structure of the VSL material for all my
objects to let users simply change the possible parameters that match
the in-game material properties without having to modify the actual
VSL code.

Regards,
Fredrik Bergholtz