Basic IES Light Tutorial using V-Ray for SketchUp

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By Nomer Adona

I am writing another IES lighting tutorial again showing the basic steps in using V-Ray for SketchUp 1.48.90 and future releases. Previously I had used 1.48.66 in my first IES tutorial, IES Light Tutorial using V-Ray for SketchUp but there seemed to be a few little bugs with that particular updated version. ASGVIS (now owned by Chaos Group) made a tremendous leap, and I can really conclude that their newest build is  much more stable and easier to use. I planned to use the same file that I used with the first tutorial, but I have decided to just model a quick one for this new tutorial. I am using here also a photometric data name 6B3_(100A19).ies that I have downloaded for free from Lithonia, or SketchUpArtists Download Section and found under Tutorial Files.

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In this tutorial, a special thanks to my friend Trang An. I am using some of his excellent components here for the purpose of seeing the overall effects of the IES lighting, instead of just using a simple room. In this tutorial, my materials have no reflections, bump etc (except for the receptacles) for quick rendering but later I will supply you hopefully with another tutorial on how to play with materials. Anyhow lets get started this tutorial.

1. SketchUp set up. Basic model and components.

SketchUp Setup

Step 1

2. I have created a simple recessed light and made it into component. Then, I copied this component into 4 more instances. This is a good tip, so that when you place the V-Ray lighting; automatically you will have an instance of this lighting. This is the same when editing your V-Ray light, you will only edit one light inside this component, and the other lightings will be edited automatically. In the following image, I created V-Ray IES lighting, scaled it a bit and placed it below the receptacle.

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Step 2

3. Then I clicked the IES light icon. Another menu box appeared (see below). Then under sampling (File) I clicked the box and browsed the IES photometric data (6B3_(100A19).ies. By default the power is set to 0. Even with this, V-Ray SketchUp will read the photometric data.

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Step 3

In my opinion, using V-Ray sun and V-Ray physical camera is not necessary when rendering  an enclosed space. This is advisable especially for beginners. The reason is, you don’t have to spend a huge amount of time in balancing the sun and the physical camera. V-Ray physical camera works together with the V-Ray sun, which is really a very strong light. The V-Ray physical camera acts like a counter balance in correcting the exposure of the image, much like an actual photo camera – where ISO, aperture size and shutter speed enable to control the exposure. Again in this tutorial, the V-Ray physical camera and the V-Ray sun were both turned off.

Here is the render.

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Step 4 - Render

The above render is already showing the effect of the photometric lighting. On the other hand, I would want to see two things – the light source showing some lights and secondly I would like to increase the power of the IES lighting.

5. To achieve the first one, I am putting another rectangular light inside the receptacle to simulate the light source. The intensity of this rectangular light is small. I enabled the light, turned off the shadow, made it invisible and double sided. Below is the screen grab of my rectangular light settings.

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Step 5

Here is the render. Now the light source is showing on the receptacles.

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Step 5 - Render 1

To solve the second problem, I simply increased the multiplier of the IES light. Here I used power = 7000. Below is the render.

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Step 5 - Render 2

6. If you want to change the color of the IES light, you can do it by putting color to the filter
color. Below I used warm yellow.
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Step 6 Final Render

Now it’s up to you how you will do the next step. I hope this small tutorial did manage to clear up some of the confusion in the first IES tutorial.
Cheers!
Nomer Adona

Some of Nomer Adona’s other tutorials here at SketchUpArtists:


23 Responses to “Basic IES Light Tutorial using V-Ray for SketchUp”

  1. SketchUpArtists Updates November 2010 | The Daily CatchUp on November 8th, 2010 12:45 pm
  2. Noriel on December 21st, 2010 7:28 am

    helps alot for a newbie like me.Thanks!

  3. New IES tutorial using the vraysketchup « Nomeradona on January 4th, 2011 4:40 am
  4. THANH on April 22nd, 2011 5:31 am

    GREAT! THANK

  5. momodesigner on April 28th, 2011 6:46 am

    thank alot !

  6. NoelFRJ on May 11th, 2011 7:40 am

    What`s the difference between IES and Spot lights in VRAY for Sketchup? And Omni lights?

  7. nomer on May 19th, 2011 5:35 am

    @noel, IES are photomoetric data format. It has been widely used by many lighting manufacturers and is one of the industry standards in photometric data distribution. An IES file is basically the measurement of distribution of light (intensity) stored in ASCII format. You can think of it as a digital profile of a real world light. In 3d engine software like vraysu it can be used for creating lights with shapes and physically accurate form. While omni light is a point source of illumination that shoots out in all directions. The photometric data + intensity dictates the effect of light on any surface while omni doesnot rely on any data on its effect. i guess you try them and the clarity of the answer will be find by yourself when you use them.

  8. rasler on June 5th, 2011 4:20 pm

    i have vray for su version 1.49.01
    the IES lights don’t render after i load the files. What am i doing wrong?

  9. Jose Rodriguez on August 6th, 2011 6:06 am

    Greetings!
    I’ve been trying to learn vray following your tutorials, which by the way I think they’re genius! yet it seems I have some problem that I’m not sure what could be the reason. I’ve installed version 1.48 in Sketchup8, I’ve created a scene pretty similar to the one you’ve used in this tutorial, i add the lights but when i try to edit them i can’t change the “power” parameter, it’s set to 0.0 and the only option i get is -0.1 I’ve read that this value means the intensity measured in lumens. Then when I render the scene (leaving all the default options) the light does not appear at all, could it be some configuration on my computer? it’s a pc (vista)

  10. brukton on August 11th, 2011 1:18 am

    thanks for the helpful tips keep it up. Again thanks alot

  11. jl arquitecto on August 19th, 2011 3:01 am

    i have a huge problem i follow the turorial set by setp an d my render is allay a black screen…..can any one help me????

  12. dwing on August 31st, 2011 5:27 pm

    question sir, why is the light too huge? like it will not fit for my room,,,its like out of scale…is there something wrong with it?btw thanks for the tutorial..

  13. ziad on September 13th, 2011 8:56 pm

    where can i find tutorials that start from scratch .i fed up searching the internet i really want to learn v ray.

  14. admin on September 14th, 2011 2:25 pm

    @ziad Hi, if this is to advanced for you you can check out the video tutorials here to get you started http://www.youtube.com/user/asgvis
    Also the PDF for V-ray for SketchUp http://www.chaosgroup.com/en/2/support.html
    and their forum is helpful for beginners…:))

  15. Adolf Reyes on September 28th, 2011 1:44 pm

    Thanks Sir Nomer for this tutorial. I have been workin gin the lighting industry for a long time now and have been using IES files and other photometric data formats in our lighting design calculations. With IES working in Vray especially for SU, it made our lives easier here in terms of doing quick and accurate lighting design concept presentations..

    Thanks a lot and more power!

    Adolf Reyes

  16. MAE on June 3rd, 2012 9:34 am

    I don’t have the browse button under sampling. What should i do? I only have it under options but there is no file for ies that I can browse

  17. CBrumm on November 26th, 2012 4:58 pm

    I cannot get any ies light files to render, however rectangular lights, omni’s work… I downloaded your ies file sheet and they are all .jpg file formats- do you know of a place to acquire legitimate ies files? I have tried lithonia lighting and can’t find any magic there either. Thanks.

  18. Lighting with V-Ray for SketchUp – definitive guide part 1 | LE MINH BLOG on December 30th, 2012 8:06 am

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  19. m.a on May 7th, 2013 3:42 pm

    sir, i have tried to use the IES file same as you cited to your tutorial, but it didn’t load, all i’ve got was black surface. though when i try to render with spotlights, the lights would work. what can be the possible solution with this problem with the IES lights?thank you..

  20. Carlo on July 1st, 2013 2:16 pm

    I also have the problem of Jose Rodriguez.
    my light intensity is set to 0.0 and cannot be changed in any way, exept fr the value -1.0.

    Please help us.

    thanks

  21. neha on July 23rd, 2013 6:43 am

    hello sir,
    i loved your work but i have been trying to load the vray in my google sketchup6 but i am not able to download and not able to find where to download it from so please please help me out and let me know from where do i have to load it from
    thanking you
    neha

    india

  22. jef medina on August 23rd, 2013 5:28 am

    hi sir,please help…ive been working your tutorial so many times ,i think i have done as instructed but when i will start to render ,all lights are too bright,.even if i edited the power to .0005 ,it is still bright,i cannot come to an output as close as yours..is there something wrong with my vray settings?i am using vray for sketchup 1.48…my sketchup version is 8…

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