I need to write them down one of these days, but going by memory here, the lower 100's on thin film usually produce a subtle blue/purple effect,  and the 300's and up have a orangy-red like the chamelion paint (dupont made it first, I think!), similar to tear-off visor shields on race helmets. I haven't used the 200 range much as the intervals are pretty wide in the color band.

I would think the light source used has something to do with it as well, but in this instance, I too prefer the 'Sun' light for quality and shadow effect, when you can get away with it that is!

I didn't mean to bash on your rez size, just curious! 

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