[Deepcontact]

I am pretty new at Maxwell :

IF I am working in Meters in MAX 7.0:

Display Units: Meters
System unit scale: 1 Unit = 1,0 Meter
Maxwell System: 1,0 (wich is says, 1,000 units in Max is equal to 1 maxwell meter)

If I want to work in cm:
Display Units: Centimeter
System unit scale: 1 Unit = 1,0 Centimeter
Maxwell System: 0,01 (wich is says, 100,000 units in Max is equal to 1 maxwell meter)

And at last but no less...milliimeters
Display Units: millimeters
System unit scale: 1 Unit = 1,0 Millimeter
Maxwell System: 0,001 (wich is says, 1000,000 units in Max is equal to 1 maxwell meter)


Ok...can Anyone Confirm this if is not too much trouble?? Just to be sure (I think is the correct configuration anyway, but nobody is perfect and I've been proved wrong before)

Now for the question ahead.

I know that there has obviously been a post about photometric lights. I mean something like 3d MAX lights pressets (Halogen, High pressure sodium, ect). I can see that the posibility to have messurement in Cd (candela) Lm (lumen) Or Lx/Lx at (Lux) is not possible, even if it is the best way for som people to control the light more precisely. (the fixtures are another problem in another world wich I love the oportunity to be able to build our own)

Ok the Emitter material on the iluminant type C I guess that it is the most relevant to simulate a Light bulb. Here is my scene without using maxwell so you see the components.


Description:
The units are meters (like the first example mentioned above), the plane (box) is 2mX2m, the teapot is 20cm and the Sphere (with 4 faces) is placed 1,5m above the plane. the material is Maxwell diffuse with white color no sss.

Now..I rendered in Maxwell with a emiter type A- 60W (when using just W the emitter size is unrelevant for the distribution and intensity of light) and since I am not a great photographer I use Fstop 2,0 and shutter 1/250
and the ISO 200 (i am getting the double amount of light in my film) My question is...Doesn't seems too dark and low intensity?
I mean for a 60W bulb?


Here is another example with the Custom preset in white color, the same effect 60W


Is it Just me?...It seems too dark. Ok..maybe my camera settings are totally wrong fstop, shuter, ISO and so on...Maybe the settings on my light bulb are wrong...or maybe my settings are wrong in everything. I want to be sure now that I am rendering in maxwell and my old scenes are going to be converted (wich I will post so you guys can break my ego)

I know that Tom is a magical mand with powers in his fingers...Can you snap your fingers and iluminate me?? or send me back to the shadows??

Just a little help?

By the way, Spanish, English, Danish, doesnt matter...know them all, feel free to use the language you are most confortable with.

Thank you in advance and sorry about the legth of it and the fact that is Sunday.

By the way..What is poll? (Poll question, option and so on)?

Great Forum, great minds, and great help (and I am not just sucking up guys)

[philipbruton]

Display Units: Meters
System unit scale: 1 Unit = 1,0 Meter
Maxwell System: 1,0 (wich is says, 1,000 units in Max is equal to 1 maxwell meter)

If I want to work in cm:
Display Units: Centimeter
System unit scale: 1 Unit = 1,0 Centimeter
Maxwell System: 0,01 (wich is says, 100,000 units in Max is equal to 1 maxwell meter)

And at last but no less...milliimeters
Display Units: millimeters
System unit scale: 1 Unit = 1,0 Millimeter
Maxwell System: 0,001 (wich is says, 1000,000 units in Max is equal to 1 maxwell meter)

This is read incorrectly, it should read,

- 1.000 units in max

- 100.000 units in max

- 1000.000 units in max

they are full stops !

[big K]

just a quick reply,
i havn´t read everthing in your message.
but the thing using a camera is, you can get almost every pic too dark when using a too short shutter time in combination with a certain aperture (here Fstop). if you have a 1/250s shuttertime in combination with an Fstop of 2.0 and even a 200 ISO film it is still way too underexposed for a 60w bulb. would have happened in reality as well.
so you cannot compare scenes shot with a camera (like maxwell does) with real light intensity because your camera settings and optics matter a lot.
I am sure that in the near? future it will be possible to get a professional light analysis out of maxwell. (but not as a camera snapshot rendering)

hope it helps
cheers
michael

[andronikos916]

about the maxwell scale:

if you have max in meters = 1 maxwell unit

if you have max in cm = 0.1 maxwell unit

if you have max in mm = 0.01 maxwell unit

cy,
Andronikos

[Deepcontact]

This is read incorrectly, it should read,

- 1.000 units in max

- 100.000 units in max

- 1000.000 units in max

they are full stops !

Actually philip, in the rest of Europe, like in Danmark or Spain, when you have Decimals in a number, they allways come after a coma "," not a full stop. that is something you have in United Kingdom because of your meassurement system, and the way you represent the units in a number which USA got also from you guys (wich I think is perfect and I am used to that) and since the Maxwell I got is in english..yes i give you that, It is incorrect (...just replace the coma with a full stop). I guess I was thinking too metric this time. So I apologize.

you cannot compare scenes shot with a camera (like maxwell does) with real light intensity because your camera settings and optics matter a lot.

Thank you Big K
That is what I was thinking about..that the hole scene is ok but my camera settings are totally wrong. Thank you for the help, I guess I have to learn photography now. But I am getting there....

[Deepcontact]

Mr Andronikos:

I think (and I say I think) that you are wrong with your definitions.

about the maxwell scale:

if you have max in meters = 1 maxwell unit

if you have max in cm = 0.1 maxwell unit

if you have max in mm = 0.01 maxwell unit

Here you have a good link to see where you may be making a mistake. Check the centimeter explanation or decimal value i relation to one meter...

http://www.essex1.com/people/speer/large.html

Thank you.

[Deepcontact]

Well since I have a problem with my photography knowledge here is the same Picture with the same Fstop (4.0) and I reduced the Shutter speed from 250 to 60 and here is the final image... wich it seems more proporcionally realistic. (Of course with the real Scale Settings, in this case in meters)