Real light

[ZuluQ]

Hi guys, i have a question, i dont know if anybody can answer it. Im an architect and i need to simulate light in a room for example with vray, but in a real way, i mean, i need to know if the windows that i create in the room are good enough to iluminate it, but without any trick, just the physical light, cause if they dont i have to add more windows or make them bigger. How can i know if the light are accurate, that is the real light? I dont know if this is possible. Thanks a lot for your atention.

[Tong]

Use Vray Sky,Sun, and i think phys.camera (it`s like real camera with exposure).

And you can use IES files with lights from lamps, it`s will be real light indeed.

http://www.studiopc.com/support/3dsmax5/Photometric_Lights.pdf
http://www.evermotion.org/index.php?unfold_exclusive=86&unfold=exclusive

[glass.use]

best solution is maxwell render.. its know for it reality as taking photo and no tweaks in render

but im a vray fan :roll:

[Tong]

but i will need small renderfarm to feed that animal named "maxwell" ;-)

and the lead programmer has gone away from they, so future in the twilight zone.

so many renders now for Cinema, look at fryrender too, it`s faster then maxwell, but it`s have some dis advantages with that fast.

[stefan]

you can use maxwell, fry or vray for that.

in vray just do as tong said,yes
cheers
stefan

[ZuluQ]

Thank you all! i'll take your advise.

[Emre]

Hi
I wonder how accurate it is when using IES lights. There is also this multiplier in the tag. Doesn't it ruin the reality if we play with the multiplier? Or what should we set the multiplier to, does it differ when using cm or mm units?

[stefan]

the multiplier should be 1 for absolute realism, the scale of the overall modell should be realworld, no matter which units used.
cheers
stefan

[rhodesy]

i guess we can still tweak the colour mapping in vray to lighten those dark areas - so what is the best way to get true realism, just leave the colour mapping alone? I do like the colour mapping feature though its real handy for balancing images.

[stefan]

colormapping is essential actaully for realistic images.
cheers
stefan

[Emre]

IMHO it is not possible to simulate real light. Because it depends on so many variables. It is the same in real world. If you take a photo of a scene it doesn't mean that the lighting is exacltly the same as it looks in the photo. Shutter size etc. Same goes here for colormapping etc.

[ak-vision]

hi,

i think it is always a problem for visualization software to simulate real light. For this you need software for lightplanning like relux. There you get information about the illuminace or luminace of walls or floors, what is necessary to compare different light situations.

regards
Andre