--- title: "V-Ray Luminaires: a new method for dramatically faster and more accurate rendering of complex light fixtures" description: Pioneering V-Ray Luminaires, introduced with V-Ray 7, rapidly render light fixtures in a fraction of the time and with greater accuracy. image: https://blog.chaos.com/hubfs/With_V-Ray_Luminaire_Image_3.jpg --- [Chaos Logo](https://blog.chaos.com/) - Products - [Enscape](https://www.chaos.com/enscape) - [V-Ray](https://www.chaos.com/vray) - [Corona](https://www.chaos.com/corona) - [Veras](https://chaos.com/veras) - [Cloud](https://chaos.com/credits) - [V-Ray Blender](https://www.chaos.com/vray/blender) - [Arena](https://www.chaos.com/arena) - Industry solutions - [Education](https://www.chaos.com/education/educational-hub) - [Student](https://www.chaos.com/students) - [Educator](https://www.chaos.com/educators) - [Institutions](https://www.chaos.com/educational-institutions) - [Architectural design](https://www.chaos.com/architecture) - [Architectural visualization](https://www.chaos.com/architectural-visualization) - [Interior design](https://www.chaos.com/interior-design) - [Landscape rendering](https://www.chaos.com/landscape-architecture) - [Urban planning](https://www.chaos.com/urban-planning) - [Film and television VFX](https://www.chaos.com/film-vfx) - [Virtual production](https://www.chaos.com/virtual-production) - [Advertising](https://www.chaos.com/advertising) - [Automotive](https://www.chaos.com/automotive) - [Games](https://www.chaos.com/games) - [Product design](https://www.chaos.com/product-design) - [Software development](https://www.chaos.com/developers) - Learning & Community - [Learning](https://chaos.com/learning) - [Chaos Academy](https://academy.chaos.com/) - [Blog](https://blog.chaos.com/) - [CGconnect](https://chaos.com/cgconnect) - [Gallery](https://chaos.com/gallery) - [Forum](https://forums.chaos.com/) - Support - [Contact Support](https://chaos.com/contact-us) - [Help Center](https://support.chaos.com/hc/en-us) - [FAQ](https://support.chaos.com/hc/en-us/categories/360003671518-FAQ) - [Documentation](https://documentation.chaos.com/) - [Pricing](https://www.chaos.com/pricing) [Try](https://www.chaos.com/free-trial) [Buy](https://www.chaos.com/pricing) - Products - [Enscape](https://www.chaos.com/enscape) - [V-Ray](https://www.chaos.com/vray) - [Corona](https://www.chaos.com/corona) - [Veras](https://chaos.com/veras) - [Cloud](https://chaos.com/credits) - [V-Ray Blender](https://www.chaos.com/vray/blender) - [Arena](https://www.chaos.com/arena) - Industry solutions - [Education](https://www.chaos.com/education/educational-hub) - [Student](https://www.chaos.com/students) - [Educator](https://www.chaos.com/educators) - [Institutions](https://www.chaos.com/educational-institutions) - [Architectural design](https://www.chaos.com/architecture) - [Architectural visualization](https://www.chaos.com/architectural-visualization) - [Interior design](https://www.chaos.com/interior-design) - [Landscape rendering](https://www.chaos.com/landscape-architecture) - [Urban planning](https://www.chaos.com/urban-planning) - [Film and television VFX](https://www.chaos.com/film-vfx) - [Virtual production](https://www.chaos.com/virtual-production) - [Advertising](https://www.chaos.com/advertising) - [Automotive](https://www.chaos.com/automotive) - [Games](https://www.chaos.com/games) - [Product design](https://www.chaos.com/product-design) - [Software development](https://www.chaos.com/developers) - Learning & Community - [Learning](https://chaos.com/learning) - [Chaos Academy](https://academy.chaos.com/) - [Blog](https://blog.chaos.com/) - [CGconnect](https://chaos.com/cgconnect) - [Gallery](https://chaos.com/gallery) - [Forum](https://forums.chaos.com/) - Support - [Contact Support](https://chaos.com/contact-us) - [Help Center](https://support.chaos.com/hc/en-us) - [FAQ](https://support.chaos.com/hc/en-us/categories/360003671518-FAQ) - [Documentation](https://documentation.chaos.com/) - [Pricing](https://www.chaos.com/pricing) [Try](https://www.chaos.com/free-trial) [Buy](https://www.chaos.com/pricing) [\< All Blog Posts](https://blog.chaos.com) Vladimir Koylazov Last updated: August 20, 2025  •  5 min read # V-Ray Luminaires: dramatically faster, more accurate rendering of complex light fixtures **Summary:** - V-Ray Luminaires, introduced in V-Ray 7, efficiently render complex light fixtures by precomputing a light field, significantly reducing render times. - Realistic light fixtures are crucial for photoreal visualizations, but they are computationally intensive. V-Ray Luminaires address this by creating a VRayLuminaire light that emulates the fixture's emission. - Using luminaire light fields, scenes render faster and with less noise compared to traditional methods, as demonstrated by a reduction from 22 minutes to 1 minute in a sample scene. - VRayLuminaire lights improve rendering accuracy and speed, especially in complex lighting scenarios, by avoiding the need for clamping and allowing for better light distribution. - Most Chaos Cosmos light fixtures include luminaire files, enabling easy integration. If a fixture lacks a luminaire file, it may not benefit from one due to simple light transport.   V-Ray Luminaires, introduced with V-Ray 7, is a new method that rapidly renders complex light fixtures in a fraction of the time. Vlado walks us through how it works. Realistic light fixtures are essential for creating photoreal visualizations, both interior and exterior. In the real world, these fixtures can be very complicated combinations of light sources and diffuse, transmissive or reflective surfaces surrounding them in order to create the desired light distribution. However, accurately simulating the overall illumination from such fixtures is a computationally intensive task, and most often than not, they end up being simplified in order to get a result in a reasonable time frame. The [Cosmos library](https://www.chaos.com/cosmos) — included with most Chaos products — includes many light fixtures, some of which are provided by companies producing the original physical versions of these fixtures. As such, they are modeled in a realistic way in order to correctly represent the product in 3D scenes. While these models are very accurate, they may also be somewhat challenging to render. The **V-Ray Luminaires**, introduced in [**V-Ray 7**](https://www.chaos.com/vray), provide a completely new way to efficiently and accurately render such light fixtures. In a pre-computation step, we calculate a very accurate version of the light field surrounding the light fixture — i.e., the amount of light emitted in any given direction from the surface of the luminaire — and store this in a file that accompanies the relevant Cosmos models. When the model is imported from the Cosmos library, in addition to the geometry and the light sources, **a new type of light source** is created as well, called a **VRayLuminaire light**. This light encompasses portions of the light fixture and emulates its emission when viewed from outside. The VRayLuminaire light references the precomputed light field and also allows to control aspects of the light fixture as a whole — including the color of the lights and their intensity. Here is an example of a simple setup where a scene is lit by two light fixtures. Each fixture consists of a light source surrounded by a lamp shade as can typically be seen in the real world. If we render this without the help of the luminaire light field, the result would look like this: Rendering the scene **without luminaire light fields** in 21m 50s The resulting sampling rate: The scene renders in about 22 minutes on an AMD Threadripper 2990WX CPU. The result is quite noisy even with 1/40 AA subdivs and for most of the pixels in the image, the maximum number of samples per pixel were used (the red pixels in the sample rate render element) without reaching the specified noise threshold. This is because a large portion of the illumination is due to light bouncing off the interior of the lampshade and into the scene. Additionally, by default V-Ray clamps some of the GI in order to make the rendering happen in a reasonable amount of time (this is controlled by the “Max ray intensity” parameter) — however this leads to slightly darker illumination from the light fixture. On the other hand, if we render the same scene with the help of luminaire light fields, the result looks like this: Rendering the scene **with luminaire light fields** in 1m 1s The resulting sampling rate: **The luminaire version renders much faster** (1 minute vs 22 minutes before) while at the same time the final result is less noisy because the noise threshold was reached almost everywhere. Furthermore, the lighting distribution is also more accurate with no light lost due to clamping. Another example shows the advantages of the VRayLuminaire when complex light transport paths must be computed. In the following example, the light emitted by the fixture comes from a thin paper material that scatters the light coming from the spherical sources inside it. This is a complicated situation to render with any renderer. **Without the luminaire, the image renders very slowly and is darker** than it should be — by default V-Ray clamps the contribution of GI rays to help reduce render times. If we want to get a more accurate emission from the fixture, we have to disable the “Max ray intensity” parameter — this brings the result closer to the expected brightness but it takes even more time to calculate. Even with 1/100 adaptive image samples, this was not enough to reach the desired noise threshold everywhere in the image (there are red areas in the sample rate render element). In contrast, using a VRayLuminaire helps to render the image at a small fraction of that time with a more accurate lighting distribution. No VRayLuminaire, Max ray intensity enabled, 53min   No VRayLuminaire, Max ray intensity disabled, 2h 46min   ###### With VRayLuminaire, 1m 11s   Most of the light fixtures in Chaos Cosmos come with luminaire files, so using them is simply a matter of drag and drop. If a light fixture doesn’t have a luminaire file, it either has no light sources, or adding a luminaire does not improve the results (for example, if the light sources directly illuminate the scene and there is no complex light transport). A tutorial on creating luminaire files for custom light fixtures is coming soon. ## Working with VRayLuminaire light sources If a light fixture has a VRayLuminaire object attached to it, then control of the light emitted from the fixture, like intensity and temperature, should be handled from the VRayLuminaire object. However, at this time, disabling a VRayLuminaire light simply disables the light field calculation and not the regular light sources that are a part of the light fixture. An easy way to disable all of the light emitted from the fixture is to set the intensity of the VRayLuminaire light to 0.0. Similarly, in the VRayLightMix system, the original lights in the fixture and the VRayLuminaire light will appear separately; this is something that will be improved in subsequent V-Ray 7 releases.   ### Ready to try Chaos products? Start your free trial today and explore all features. [Start Free Trial](https://www.chaos.com/free-trial) Share [mailto:?subject=V-Ray%20Luminaires:%20a%20new%20method%20for%20dramatically%20faster%20and%20more%20accurate%20rendering%20of%20complex%20light%20fixtures&body=V-Ray%20Luminaires:%20a%20new%20method%20for%20dramatically%20faster%20and%20more%20accurate%20rendering%20of%20complex%20light%20fixtures%20https://blog.chaos.com/v-ray-luminaires](mailto:?subject=V-Ray%20Luminaires:%20a%20new%20method%20for%20dramatically%20faster%20and%20more%20accurate%20rendering%20of%20complex%20light%20fixtures&body=V-Ray%20Luminaires:%20a%20new%20method%20for%20dramatically%20faster%20and%20more%20accurate%20rendering%20of%20complex%20light%20fixtures%20https://blog.chaos.com/v-ray-luminaires) [V-Ray](https://blog.chaos.com/tag/v-ray) [Innovation Lab](https://blog.chaos.com/tag/innovation-lab) Vladimir Koylazov As Head of Innovation, Vladimir “Vlado” Koylazov leads the Chaos Innovation Lab and oversees Chaos’ research, development, and experiments with the latest technologies. He co-founded Chaos in 1997, developed the globally acclaimed rendering software V-Ray, and held the role of Chief Technical Officer for over 20 years. During this time, he has been the driving force behind the software development and R&D at Chaos, as well as an active member of the global CG community. Vlado is a graduate of Sofia University’s Faculty of Mathematics and Informatics. ## Related Articles ### [September 28, 2026 What 3D Software Should Architecture Students Learn First? A Career-Honest Answer Ana Savova  •  11 min read Read more](https://blog.chaos.com/best-3d-software-architecture-students?hsLang=en) ### [September 21, 2026 ICX and Profile-Guided Optimization in V-Ray Dian Nikolov  •  17 min read Read more](https://blog.chaos.com/icx-profile-guided-optimization-vray?hsLang=en) ### [September 18, 2026 The 2026 Chaos Architectural Visualization Showreel is here Dinnie Muslihat  •  1 min read Read more](https://blog.chaos.com/architectural-visualization-showreel-2026?hsLang=en) [Visit the blog for more articles](https://blog.chaos.com) ## Subscribe to Our Blog Get the best tips and articles delivered straight to your inbox! Subscribe to our newsletter. Learn all about the latest news, company updates and recommended content, cherry-picked for you. 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