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IES

Postby samhal » Sat Feb 22, 2014 12:48 pm

samhal Sat Feb 22, 2014 12:48 pm
Hey all you gurus. Whats the best way to setup IES lighting? Lets say I want to have some track lighting in a room along a wall (which by funny coincidence, I do)...how do you set something like that up?

Thanks,
Sam
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Re: IES

Postby TRRazor » Sat Feb 22, 2014 1:57 pm

TRRazor Sat Feb 22, 2014 1:57 pm
Just to make sure we're on the same page:
Are you talking about something like this ?

Image

If this is the case you could load the ies-bitmap into the "efficiency or texture" channel of your lamp mesh.
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Re: IES

Postby samhal » Sat Feb 22, 2014 2:09 pm

samhal Sat Feb 22, 2014 2:09 pm
TRRazor wrote:Just to make sure we're on the same page:
Are you talking about something like this ?

Image


Thats the exact page! :D Thats pretty much what I did...it just doesn't "look" as good as some of the renders in the gallery here. Also, hotspots from hell unless I blur everything beyond recognition.
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Re: IES

Postby TRRazor » Sat Feb 22, 2014 2:19 pm

TRRazor Sat Feb 22, 2014 2:19 pm
What renders are you referring to specifically ?

mhhh...well I've found an article in the OctaneRender for 3DS Max FAQ that is referring to the subject http://render.otoy.com/manuals/3dsMax/?page_id=97

However - if I try to reproduce it inside OctaneRender for Poser (using only a sphere) it doesn't show the ies texture in the light.
Paul, any suggestions ? Is this even possible in the Poser plug-in ?
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Re: IES

Postby samhal » Sat Feb 22, 2014 2:37 pm

samhal Sat Feb 22, 2014 2:37 pm
Hmmm...damned if I can find it! Hell it may even have been a google search, but what I'm after is something like this:
http://justviz.com/?portfolio=montpellier-street the second image - Master Bedroom
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Re: IES

Postby TRRazor » Sat Feb 22, 2014 2:52 pm

TRRazor Sat Feb 22, 2014 2:52 pm
Well one way would be to actually add a shaped glas in front of the light bulb that refracts the light in the way visible in the scene.
That would however takeaway a ridiculous amount of rendering speed.
I just tried it with several .ies and jpg files and it would not accept shaping the light output...

I know it works in Octane standalone it doesn't seem to be integrated into the Poser plugin though...maybe I'm all wrong and I'm too stupid to figure it out myself ^^

EDIT:
You have to attach the .ies-file to the distribution of your light source.
Set the distribution to grayscale or rgb image point to the .ies-file and voila ! Hope this helps :)
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Re: IES

Postby Erick » Sat Feb 22, 2014 3:01 pm

Erick Sat Feb 22, 2014 3:01 pm
Somewhere in the manual I read, that it's probably best, to put the IES map into the Distribution (and/or Orientation) slot. And to use a sphere.

Edit: Here's a link to the manual:

http://render.otoy.com/manuals/Standalone/?page_id=390

Edit-Edit ... what TRR just said =)
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Re: IES

Postby TRRazor » Sat Feb 22, 2014 3:33 pm

TRRazor Sat Feb 22, 2014 3:33 pm
I just did a quick setup for you, so you can see what I mean:

Setup of the scene:
Image

Finished result:
Image
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Re: IES

Postby samhal » Sat Feb 22, 2014 5:03 pm

samhal Sat Feb 22, 2014 5:03 pm
Ah-ha! Perfectamundo guys! A million thank yous!!!

Another case where RTFM would have saved me alot of headache.
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Re: IES

Postby TRRazor » Sat Feb 22, 2014 5:13 pm

TRRazor Sat Feb 22, 2014 5:13 pm
You're very welcome :)
And yeah, sometimes it can help ;)
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