What to use for accurate light calculation?

[Zdravko Barisic]

...but not to be a hardcore software like a Radiance od DIALux or insight?

What would you use to make the external lighting of building?

It has to be very nice and photoreal and accurate.

Mission imposible?

Vray camera+IES lights? But thats not accurate?

Old school lightscape? hard for modeling?

Any solution or workflow?

[Mister3d]

IMO, there's not anything accurate. If you change camera exposure, it differs. If sun goes under a haze or clouds, it differs. It also differs in different year's time. Cameras differ. But perhaps working using real values of your camera and IES lights is the best try.

[Zdravko Barisic]

Understand, but I mean something like this

 

http://www.zumtobel.com/specialproducts/default.asp?lang=1&cube=1164

 

it is done with inspirer.

Or Lightscape? A lot of lighting manufacturer accept Lightscape as a proper tool, but is there something new?

Or how to achieve Lightscape's accuracy with beaty of Vray?

[Nic H]

whats the purpose?

'accurate' external lighting? bit of a misnomer imo

there are so many ways you coudl do it, depends what the aim is? art? or simulation?

whatever your aim, if photoreal is your goal you will need to use photoreference, have knowledge of photography and pay huge amounts of attention to your textures and models.

 

good luck.

[shaneis]

Understand, but I mean something like this

 

http://www.zumtobel.com/specialproducts/default.asp?lang=1&cube=1164

 

it is done with inspirer.

Or Lightscape? A lot of lighting manufacturer accept Lightscape as a proper tool, but is there something new?

Or how to achieve Lightscape's accuracy with beaty of Vray?

 

I think you might have to wait until either a) Inspirer has better materials, cameras and caustics or, b) VRay etc have more accurate light calculation/ simulation.

 

Considering the fact that scientists are yet to completely understand the properties of light and that computer graphics is still only a simulation of what scientists are yet to fully understand, I'd have to agree with nicnic and Mister3d - there isn't an aapplication available yet that is truly accurate.

 

As it stands, I think the closest you could get would be something like Maxwell or Fryrender.

[Nic H]

ah yes give Fry a go.

iv been wanting to for ages.

[shaneis]

Ironically, if you do eventually give fry a go, you'll still be waiting for ages

[Zdravko Barisic]

whats the purpose?

'accurate' external lighting? bit of a misnomer imo

there are so many ways you coudl do it, depends what the aim is? art? or simulation?

whatever your aim, if photoreal is your goal you will need to use photoreference, have knowledge of photography and pay huge amounts of attention to your textures and models.

 

good luck.

 

 

Yes, external lighting, if it were indoor I would just go with simple radiosity+IES, for outdoor radiosity is not so good I think.

 

 

I think you might have to wait until either a) Inspirer has better materials, cameras and caustics or, b) VRay etc have more accurate light calculation/ simulation.

 

Considering the fact that scientists are yet to completely understand the properties of light and that computer graphics is still only a simulation of what scientists are yet to fully understand, I'd have to agree with nicnic and Mister3d - there isn't an aapplication available yet that is truly accurate.

 

As it stands, I think the closest you could get would be something like Maxwell or Fryrender.

 

HM? Maybe that is closest to time/ accurate/ good nice look image? Maxwell handles OK artificial light but I can not remember does Maxwell support IES?

Edited October 29, 2008 by okmijun

[Mario Pende]

You should contact Asim Harabs from Zumtobel, on this issue.

Hes active on this forum and I think hes the only real profesional with skills in this area.

He might me able to help you or direct you.

I think you should try it with Lightscape.

[Zdravko Barisic]

Thats good idea, I will try to reach Asim ,thnks!