Good! Once you have the settings for making things invisible, you can control how much of a highlight and how many colors it will take to reveal the form. And sometimes things are better if they aren't totally invisible... so you nock down that number to 98% or whatever. You expect saranwrap to be clear, but a ghost that nobody could see wouldn't be nearly as scary as one which is almost there. You can also use this to hint at other types of vision. Doesn't Superman have x-ray vision? I can't remember if x-rays are at the lower end of the spectrum or not (damned migraine has short-circuited my memory banks), but shifting all the colors towards red and making certain things invisible might reveal the world from alien eyes. :) A neat technique is almost like a hammer in search of a nail, but when you need the hammer you need to know how to use it, too... and that takes practice. Carolly