[Thomas An.]

.... What is the correlation between Rhino units of measure and the intensity and unit values under emitters?

The maxwell emitters behave as incadescent lights of similar wattage. As long as you model in real life dimensions, then the emitter intensity should be about the same you would use in reality to illuminate the object.
So, if you are modeling a book on a desk then most likely a 50W or 80W would do.

Also, don't forget that all these (emitters, shutterspeed, fstop, ISO) are merely many ways of controlling intensity. In reality a photographer cannot alsways change the lightbulbs so he just controls the camera speed and apperture (which has the same affect as using a stronger light)

Secondly, what are some rules of thumb regarding ozone, turbidity and water in physical sky set ups? I

http://www.maxwellrender.com/forum/viewtopic.php?t=1441

Finally, I propose that the longitude/latitude values are switched to latitude/longitude with N/S and E/W rather than positive and negative values... a small detail, but I have found the values listed in this convention at almost every site that I've visited and it's kind of a pain to remember to switch them around every time.

I will add this in the wish list

[Thomas An.]

Steve,

When you use 1000 watts in your scene, what is your camera shutter and apperture ? All these things are interlinked.

You are right about the units... and I don't know why Rhinoll does not show them properly.

Power = W (Watts)
Excitance = W/m^2 (Watts per square meter)
Intensity = W/sr
Radiance = W/m^2*sr

Have you gone through the basics in this reference page ?
http://www.metinseven.com/article_maxwe ... tricks.htm

[lebbeus]

aren't these actually lumen values or candelas?? Watts (i thought) was just a measure of power consumption, not a measure of light--i.e. a 59W T8 puts out much more light than a 60W incandescent, though maybe I'm getting ahead of things since Thomas said that the emitters are all incandescent.

Are there any plans for different light types in the future? What does this mean to this discussion in such a case? Would NL move from using W as a unit and use Lumens or candelas for better consistency (easier set-up?) between different light-types? How do you model a scene that uses T8's, incandescents, and halogens now (I've got a lobby design with similar types)?? Is it just a color shift and some sort of arbitrary power setting that really only relates to real-world incandescents but not the values you find on cut-sheets for the various lights?