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Stain777
02-05-2006, 03:45 PM
I've been going through a VRay tutorial for Max and the discussion has turned to IES lighting. If you don't know this is a method for mapping actual light intensities depending on the kind of light,i.e., manufacturer, light type, intensity, etc.

C4D's AR is pretty good, and they've added many new light types that will help with accuracy. But, is it possible to use the IES values for lighting in C4D? I don't think there's a setting for importing the IES data for the light, but is there some kind of conversion possible in order to get the same effect? Has anyone done any work on this? The difference is amazing and it's certainly something that Maxon should consider going forward.

AdamT
02-05-2006, 04:02 PM
No, unfortunately I don't think there's any way to use IES data in Cinema at present. IES files include information about luminaires, scale, and falloffs as well as color and intensity, so it would be pretty hard to translate. AFAIK Cebas is planning to add IES support to fR-2, which I'm looking forward to. I'd also like to see it in AR.

Stain777
02-06-2006, 02:34 PM
No, unfortunately I don't think there's any way to use IES data in Cinema at present. IES files include information about luminaires, scale, and falloffs as well as color and intensity, so it would be pretty hard to translate. AFAIK Cebas is planning to add IES support to fR-2, which I'm looking forward to. I'd also like to see it in AR.

Thanks Adam. It seems like we're always waiting for just one more thing. ;0)

Which leads me to the next question. I believe you're a VRay user, how easy is the translation from C4D over to Max in order to use it? I've tried using .fbx to convert and the results are pretty uneven.

AdamT
02-06-2006, 03:19 PM
No, no VRay here unfortunately. I use AR, fR-2, and Maxwell (when it's working).

sunmade
02-06-2006, 05:52 PM
I want IES in FR2 or AR as well!

Is there a way to convert or interprete the ies data, er... simulate it?

"It seems like we're always waiting for just one more thing. ;0)"

Stain777, unfortunately, I share the same feeling.

Opelfruits
02-06-2006, 06:17 PM
I want IES in FR2 or AR as well!

Is there a way to convert or interprete the ies data, er... simulate it?

"It seems like we're always waiting for just one more thing. ;0)"

Stain777, unfortunately, I share the same feeling.

http://forums.cgsociety.org/showthread.php?t=308182 <<< see this thread - this is probably your best bet for a workaround

Stain777
02-07-2006, 03:56 PM
http://forums.cgsociety.org/showthread.php?t=308182 <<< see this thread - this is probably your best bet for a workaround

Thanks alot Opelfruits.

While this is a pretty good fake, I was hoping for a method to translate the data for the IES lighting. It would have opened up a world of lights that would be dialed in very precisely. Maybe next time around.

georgedrakakis
02-13-2006, 12:31 AM
Thanks alot Opelfruits.

While this is a pretty good fake, I was hoping for a method to translate the data for the IES lighting. It would have opened up a world of lights that would be dialed in very precisely. Maybe next time around.

hey m8!
you can always use Terrabrush ( a free app) to convert Euludata files into bitmaps, set them @ transparent channel of a material tag assigned to an omni light. (omni lights react better to complex data files, such 4xQR111 fixtures both uplight and downlight, etc.--> you can easily simulate these light fixtures with one single omnilight and the proper eulumdata file.)

Stain777
02-13-2006, 05:16 PM
hey m8!
you can always use Terrabrush ( a free app) to convert Euludata files into bitmaps, set them @ transparent channel of a material tag assigned to an omni light. (omni lights react better to complex data files, such 4xQR111 fixtures both uplight and downlight, etc.--> you can easily simulate these light fixtures with one single omnilight and the proper eulumdata file.)

Interesting! Do you happen to have a link for the plugin? I'd love to give this a try. :D

georgedrakakis
02-13-2006, 07:02 PM
Interesting! Do you happen to have a link for the plugin? I'd love to give this a try. :D
that's the link:
http://www.cyberfunks.de/page/terrabrush/download.htm

and also a link from a tutorial:
http://www.cyberfunks.de/page/tipps/cinema.htm

Terrabrush has a special function "importing --> LVK". Thus one can convert light distribution curves (LVK) into bit-maps (naturally also in Terragen data, but I do not see use there). This LVK shows the light distribution of the light, i.e. how much light in each solid angle of the area goes (luminous intensity). The American format "IES" cannot read TerraBrush in. It uses the EULUMDAT format used in the German-speaking countries, meisst recognizably from the ending "ldt". One knows the files in the InterNet of many German-language shining and Lamperherstellern receives www.licht.de (http://babelfish.altavista.com/babelfish/trurl_pagecontent?lp=de_en&trurl=http%3a%2f%2fwww.licht.de%2f).
(this page is written in german. the text above from the tutorial is a translation using altavista babel fish).

you can also use it with Terragen, with frat results. consult the tutorials. Enjoy!!!

Stain777
02-13-2006, 07:07 PM
that's the link:
http://www.cyberfunks.de/page/terrabrush/download.htm

and also a link from a tutorial:
http://www.cyberfunks.de/page/tipps/cinema.htm

Terrabrush has a special function "importing --> LVK". Thus one can convert light distribution curves (LVK) into bit-maps (naturally also in Terragen data, but I do not see use there). This LVK shows the light distribution of the light, i.e. how much light in each solid angle of the area goes (luminous intensity). The American format "IES" cannot read TerraBrush in. It uses the EULUMDAT format used in the German-speaking countries, meisst recognizably from the ending "ldt". One knows the files in the InterNet of many German-language shining and Lamperherstellern receives www.licht.de (http://babelfish.altavista.com/babelfish/trurl_pagecontent?lp=de_en&trurl=http%3a%2f%2fwww.licht.de%2f).
(this page is written in german. the text above from the tutorial is a translation using altavista babel fish).

you can also use it with Terragen, with frat results. consult the tutorials. Enjoy!!!

Many thanks for the quick reply. I'll jump in and see what I can figure it out with the always interesting translations. "Place your light in a handbag, and run down the fish."

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