VRayIES lights are often used to recreate existing artificial light profile distributions, for interior scenes.
Companies such ERCO and Color Kinetics have a host of exiting IES light profiles ready for download:
This article about ies lights is a small excerpt from my new book with Taylor and Francis/CRC Press, entitled: V-Ray 5 for 3ds Max 2020: 3D Rendering Workflows
For more information about my new book, please check the link directly below:
|V-Ray 5 for 3ds Max 2020: 3D Rendering Workflows|
To create a VRayIES light, use some of the steps described earlier, and refer to my other tutorial about, setting up your Initial 3ds Max scene.
Followed by selecting the VRayIES button, clicking the cursor in the Front/Left viewport , and dragging it down to create it.
Right click to exit light creation
|< Creating a VRayIES light in the viewport>|
Once the VRayIES light has been created (with its target facing downwards), users can disable the Targeted function, to move the VRayIES light.
Most of the VRayIES parameters are self-explanatory. The following discussion will focus mainly on the most important ones.
|<VRayIES light parameters>|
Enable- It enables the light to be turned On, or Off.
Show distribution- It shows the distribution of the IES light in the viewport.
IES file-This toggle allows users to locate and plug IES light profile.
IES web profiles are based on a real-world light distribution. IES 14 is one of the most popular light profiles used to create patterns of pools of light on the floor, and walls.
Note: IES 14 is included in the book resources.
|< IES web file 14 loaded from dialog>|
To preview the IES distribution in the shaded viewport, simply click on the User Defined text, and choose the Light and Shadows option.
Followed by choosing to, Illuminate with scene Lights.
|< User viewport option to Illuminate with scene Lights>|
|< Results of Illuminate with scene Lights in the viewport>|
If you happen to have a good graphics card, enable the V-Ray Viewport IPR (Interactive Production Rendering) to display a fast and accurate preview of the final render in the viewport.
|< User viewport option to choose the V-Ray Viewport IPR >|
Affect diffuse- This function determines whether the IES light will affect the diffuse color of objects, or not.
Enabled, by default.
Diffuse contribution-This function controls the intensity of the lights on the diffuse color of objects.
Default value, 1.0
Affect specular- This function determines whether the IES light will affect the specular/glossiness of objects, or not.
Enabled, by default.
Specular contribution- This function controls how much the IES light will affect the specular/glossiness of objects.
Default value, 1.0
Use light shape-This function controls how the shape of the light will be factored in to process the shadows and the illumination.
For shadows only, is used by default.
Override shape-If chosen, it disables the IES profile shape, and enables functions such as, Shape, Height, Width, Length and Diameter.
Override Intensity-This function controls how the IES light intensity will be used.
Rescale-This function matches the light intensity defined by the user.
Replace-This function recalculates(multiplies) the intensity based on the IES distribution.
Intensity type- This function determines the units of the light intensity.
Intensity value - This function controls the intensity of the IES light.
|< VRayIES light Intensity value set to 2500.0>|
|< Render result of Intensity value set to 2500.0>|
|< Intensity value IES power set to 17800.0>|
|< Render result of Intensity value set to 17800.0>|
To light up a fairly spacious scene it is recommended to create multiple ies lights. I often copy/instance (Ctrl+v) ies lights across the scene to speed up the rendering process substantially.
|Instance Clone Options enabled|
|Final render with vrayies lights|
To download professional IES profiles, simply click on my google drive link below.
Alternatively, you can create customised ies light profiles by using a plug-in called, Creator IES .
To download it, please click on my google drive link below:
For more information on how to use this plug-in, please check my tutorial link below:
Finally, below are more of my 3D Visuals created with vrayies lights (scroll down).
I hope you have found this small excerpt useful.
P.S: Take care and Stay Safe
YouTube Channel: https://www.youtube.com/channel/UCsW-Vcbz57BwPfiGIvVkSuA/videos