Quote from: goldfarb on September 17, 2009, 04:42:10 PM
a better question would be "why?"
Because Maxwell renderer is a renderer which more or less emulates lighting rather than simulating it.
Maxwell approaches real world lighting by applying real physics and therefore you should use real world scales otherwise the results will be very different.
Quote from: Seth on September 17, 2009, 10:49:04 AM
I almost never use real scale 
I use fake scale to fool people around make them believe that something is near or far away...
and I don't think it adds more works at all.
it is easier to me to populate stuff, to move around my camera, to have a good light and atmo, to have very detailed ground, etc...
and i don't know why the goal is "realism in size"... do you think my renders are less realistic because i don't use real scales ?
hehe
ask Martin, too 
Ghehe indeed

If you work with TG2 alone, no 3rd party 3D apps, and also only make still images then it is not important at all to use real world scales.
It's only time-consuming and doesn't necessarily give better looking results. It just makes TG2 life a lot easier.
Like Franck (and Volker finally changed his mind too I see!

) I'm only interested in how it looks, regardless the correctness of the scales.
There's one drawback for example you might run into using a very big diameter for softshadows to get the look you want.
Consequently you would need a lot more sampling and thus way bigger rendertimes.
The biggest scales cheat I've ever made was with this image:
http://www.planetside.co.uk/gallery/f/tg2/TU-A-Brand-New-Day-Full.jpg.htmlThis one is scale-wise ridiculous

The foreground trees are 8x bigger than the background. The grasses are about 1/6 of the foreground trees. The lake is 1000m across. The middle trees I can't remember exactly.
Anyhow, no one ever mentioned that it looked off at first sight, nor at second sight etc.

To get back on no 3rd party 3D apps and no still images: yes, of course. If you need to export your TG2 work to other apps then it probably would really pay off to use real world scales. Depending on the scaling options and how easy to do in that app as well.
Also, "wrong" scales in still images often work well, but when the camera starts flying through then it inmediately becomes apparent that they aren't correct.
So far my first cents about scales

Martin