I cant get these type of lights to work properly. The only way these lights work is if i increase the intensity/power to like 1.5 million then they work. I want to be able to use the intensity that comes preset with the file. how can i make these lights work ?

the tooltip on the brightness value will explain it. basically use a value of zero to use the file’s intensity. if you specify any other number it will be in lumens. for reference a 100watt light bulb is something like 1600 lumens. so if you have the value set to 1.5 million that’s like having a…

i understand that if i set the power to 0 the file’s power settings take over but when i do that it doesn’t work. this is what i do: open a new rhino file with default vray settings and vray materials , i create a new IES light then i assign a file to it, render, geometry is not illuminated by light…

these work fine for me with default everything, except of course i had to turn off the GI skylight to keep it from overexposing the scene: here’s my file: [IES TEST1.jpg] IES TEST.zip (22.9 KB)

For some reasons i cant download your files " rhyzx, you do not have permission to access this page" even though im registered. anyways i think changing the model units has something to do with it. i normally model in feet/inches but when i switch the units to cm the ies lights somehow work. can yo…

you might talk to support about getting your permissions fixed. my model is in inches, the wall was about 3’ tall, lights were about 5" off the wall surface. try reconstructing my scene and see if it works for you. when i change to cm (and click “yes” to scale the model by 2.54) i get the identic…

Hi Rhyzx, The V-Ray IES light should produce same light intensity regardless of the scene units. What is the exact VFR version that you are using? About the “you do not have permission to access this page” message that you get, please send us an email to support@chaosgroup.com and we will assist …

im using 1.50.22564. im pretty certain the light intensity scales with model units. at microns is very bright, everything is white, and as i go higher the light gets weaker, and weaker. it may be a bad install or a glitch with the schools systems. to get them to work i just change the model units bu…

intensity definitely did not scale with brightness in my test. pm me with your email address and i’ll send you the file.

Hey thanks for all your help. Ies lights just don’t work properly for me too bad this is a school pc.

IES ligths

V-Ray V-Ray Common Public

tashko.zashev May 8, 2013, 7:51am 11

Can you post two example scenes with different units scale, so i can try them here?

OSL – strengths and limitations

Topic		Replies	Views
Any updated IES Tutorials? Tutorials, Tips & Tricks	14	2881	February 26, 2010
Vray IES lights General	9	845	October 10, 2008
IES light power setting General	25	6427	July 6, 2010
vRay IES files and vRay Camera Issues	2	294	December 14, 2009
vRay IES lights General	2	325	January 19, 2010

IES ligths

Related topics