OTOY Forums

Here is a good collection of IES lights.
http://www.metalumen.com/products/iesall?sub=117

You can also get IES lights and a viewer from GE website


Here is a very good discription of how to use them

http://www.cgarena.com/freestuff/tutori ... ieslights/


A IES light viewer and generator

Each file has to safe as single .ies file.
Open one, you see the text, use the File > Save menu from your browser.

Cheers, mib

As always, Thanks again MIB!

this is my test

I first adjust scenario of lightning in relux. There i spent some time calculating needed lumens for this test scene.
When i found out what is number of light sources, their location etc i recreate scene in octane, and put some boxes
I used blackbody cos its was intersting to me to adjust Kelvins of lights too
Then i render it octane.
Damn, pathtracing took some time, more that hour on 460 2 gb which is too slow for me
these are pics...
this is so simple scene and cos of time needed its usefull only for final image.

*** I wish that direct lightning can do some kind of radiocity and can pass light trough glass cos its needed for test purpouses and animation too

andrian wrote:Another quick 20 minutes render, it seems renders cleared much faster using IES lights compared to area lights..
Notice the nice shadows coming from the lights above picture frames..

IES3.jpg

Hi Andrian,

could you tell me how power (in Watt system) has a emitter in this image.

Thanks a lot.

Jan

Hi. 20 watts per light with efficiency 0.05.. I might upload the IES used later when I get home..

andrian wrote:Hi. 20 watts per light with efficiency 0.05.. I might upload the IES used later when I get home..

thanks a lot. I have some troubles whit set this new lighting system.Sometimes it produce a lot of noise and fireflyes.

cheers Jan

Sorry for the delay, I was kind of busy. Here is the IES file used.. :

Hi

if you need some IES you download a SITECO Light Tools from this adress

http://www.siteco.com/en/service/planning-tools.html

you can find here a whole base of light fixture with IES file

The IES emitter material is supposed to be assigned to a sphere instead of a plane or any other object. It won´t lit the scene correctly if not assigned to a sphere.

Chris