Ies Light Download 3ds Max
With this standalone software you can create your custom photometric file easily and in few seconds. Real IES generates files compatible with a wide range of 3D rendering softwares. Being CG artists ourselves, we developed Real IES keeping in mind how time-consuming is to find proper IES files for a 3D render. Light quality is guaranteed by photometric data visually generated according to your creative necessities. In 3DS Max 10:51. Using photometric.ies profiles in Autodesk 3ds Max scene to create a precise lighting solution. Download Real IES 3 for Mac Download Real IES 3 for PC GET STARTED.
Web distribution is based on a geometric mesh that models the intensity distribution pattern of a light source.
- Create panel > (Lights) > Photometric Lights > Click Target Light or Free Light. > General Parameters rollout > Light Distribution (Type) group > Choose Photometric Web from the drop-down list.
- Photometric Webs
A photometric web is a 3D representation of the light intensity distribution of a light source. This directional light distribution information is stored in a photometric data file in the IES format using the IES LM-63-1991 standard file format, or in the LTLI or CIBSE formats for photometric data. You can load photometric data files provided by various manufacturers as web parameters. In viewports, the light object changes to the shape of the photometric web you choose. - IES Standard File Format
You can create a photometric data file in the IES format using the IES LM-63-1991 standard file format for photometric data. (IES stands for Illuminating Engineering Society.) - CIBSE Files
- LTLI Files
This tutorial shows you how to accurately replicate a real world light from alighting companyusingPhotometric lights.This particular light consists oftwenty four point light sources (14w LED) in the top and bottom LED boards.
IES file
You can use a Photometric light viewer, such as the one onhttp://www.visual-3d.com to view the IES file provided in the link above. It is depicted in a diagrammatic form for easier understanding:
IES light profile rendered with MtoaA (left) and viewed with a Photometric light viewer (right).
- Start off by creating a Photometric light and position it above the LCD board above the far left LCD hole.
- Duplicate the lights so that there are twenty-four in a row. Duplicate the row and rotate them so that they are pointing downwards as indicated in the image below.
Color Temperature
One aspect of lamp color is its color appearance – whether the light from the lamps look ‘warm’ or ‘cool’ – measured by the correlated color temperature (CCT). Lamps with a warm appearance having a CCT of 2700-3000K are generally considered appropriate in a domestic setting. Lamps of 4000K and above are considered ‘cool’ and are more appropriate for office and some retail applications. The color temperature for this particular light, as indicated by the lighting manufacturer is 4500 K.
- Use the 'Attribute Spread Sheet' window to change MtoA attributes for all of the lights at the same time. Make sure to select the shape node in order to see the MtoA attributes (use the down key ( pickWalkDown ) to select the shape node).
Lighting
Changing the exposure of the lights can be done through the light source. However, it is easier to adjust the exposure using post-processing software if the scene is rendered as a 32 bit EXR image.
Modify the light exposure in post (rollover image)
We can further reduce the over exposed areas on the wall by tone mapping the image. This also helps to reduce noise in the brightly lit areas on the wall.
- Render the scene as a 32-bit EXR.
Before tone mapping After tone mapping
Indirect Lighting
One way to improve noise and render times is to reduce the amount of indirect lighting for the Photometric lights. However, as you can see in the images below, it reduces the amount of bounced light in the scene and therefore we lose some subtle detail.
Indirect 0 Indirect 1
Diffuse Samples
The Photometric lights are quite close to the light and wall and we are getting some noise in the brightly lit areas. Increasing the Photometric light Samples does not improve the noise. Increasing the GI Diffuse Samples reduces noise but will add to render times.
Diffuse Samples 4 Diffuse Samples 2
That concludes this tutorial on using IES files with Photometric lights. You could also try to test IES files from other lighting manufacturerssuch asErco,Lamp,OsramandPhilips.
Further example
Many thanks to Astro Lighting for supplying the IES file and RIO light model.