I expect the Iron Man movie to be awesome, but there's something that really bugged me about the picture below.



What's wrong with this picture?

In a word, the light sources.  The two brightest things in the image are the lights on Mr. Downey's palm and chest.  And yet they cast no glow on, say, the bottoms of his fingers, or the bottom of his face.  This is what makes the lights look like thingos added in post-production with CGI.  They are not integrated.  Now, if, during filming, the costumers had actually built light sources into the palm-light and chest lights, that would have completed the illusion.  If I were working on this, I would have also dimmed the overhead lights and amped up the palm- and chest-lights.

We see this in movies a lot - bright laser explosions happen, but cast no light on surrounding objects.  Bright green light sabres are held inches from faces - yet cast no light, green or otherwise, on said faces.  This looks fake, people.

Check out, for contrast, this painting by Georges de la Tour from 1642 of St. Joseph:


A single light source, and everything's illuminated logically, consistently from that point.  Isn't that nice?  I guess we've forgotten how to do this in the intervening centuries. 
 
End of rant.