Explore the Multilight feature of Maxwell Render with iRender

Maxwell Render is a renowned, physically-based rendering software known for its ability to produce high-quality, photorealistic images with exceptional attention to lighting, materials, and overall visual accuracy. Developed by Next Limit Technologies, Maxwell Render has established itself as a go-to solution for architects, product designers, visual effects artists. One of Maxwell Render’s standout features is its Multilight technology, which allows users to adjust the intensity and color of individual light sources within a scene post-rendering, offering unprecedented control and flexibility over the lighting setup. 

Let’s explore the Multilight feature of Maxwell Render with iRender in this blog. 

Maxwell Render™  is a rendering engine based on the mathematical equations governing light transport, meaning that all elements, such as emitters, materials, and cameras, are derived from physically accurate models. Also, Maxwell Render is unbiased, so no tricks are used to calculate the lighting solution in every scene pixel; the result will always be a correct solution, as it would be in the real world.  All lighting calculations are performed using spectral information and high dynamic range data. 

Besides, it lets users produce precise, incredibly lifelike visuals. In the fields of architectural visualization, jewelry design, film production, scientific research, and other high-end rendering markets, Maxwell Render is the industry leader in render quality and a widely acknowledged standard. 

what is Multilight of maxwell?

The Multilight feature in Maxwell Render is an important tool that allows users to adjust the brightness and color of light sources after rendering an image, without the need to re-render. When adjustments in lighting are necessary, the Multilight TM function eliminates the need to re-render photos.

Multilight allows the user to change the intensities of individual lights and multiple scene emitters during and after the rendering process (including Physical Sky and HDR Environment Lighting), eliminating the need to run various renders to tweak the lighting setup. A recent addition to this is Color Multilight, which enables users to edit the color of emitters in real time. The adjustments can be animated over time, and a sequence of images can be saved which can then be merged into a video using video editing software. These features give users infinite possibilities saving numerous different lighting versions of the same scene without rendering it over and over again.

How it works

You will have fine control over your light mix once you select the Multilight feature in Render Options. Each emitter will have its own slider. To achieve the precise lighting mood you desire during the render or even after the render has stopped, you can simply move the lamp’s slider up and down to adjust its intensity, or intensity and color in the Color Multilight mode, rather than having to restart the render every time a lamp needs to be adjusted. The emitters units that you actually used in your scene are referenced by the sliders units.

How to activate Multilight feature in Maxwell Render

• Set up your scene with the desired light sources using your preferred 3D modeling and rendering software

• Once your scene is ready, open the Maxwell Render plugin or standalone application.

• In the Maxwell Render interface, locate the settings or options related to rendering and rendering parameters.

• Look for the Multilight feature or settings within the rendering parameters. This is where you can enable or activate the Multilight feature for your rendering.

• Once you have located the Multilight settings, you can enable the feature to start taking advantage of its capabilities.

• After enabling Multilight, proceed with configuring the rest of the rendering settings and initiate the rendering process.

• Once the rendering is complete, you can open the rendered image in the Multilight tool within Maxwell Render to start adjusting the individual light sources’ intensity and color.

You can open an MXI file in Maxwell, make any necessary lighting adjustments, and save the updated image as long as you keep the MXI file. The lighting information is saved individually inside the MXI file. By simply turning off the Physical Sky slider, for instance, you can export a photograph of the scene during the day and at night.

Export images of individual lights

For post-production needs, Multilight can even export your render as separate emitters (one separate tiff, tga, jpg, etc. per emitter), or it can save only the assembled render. To achieve this, just select the Separated or Composite mode before launching the render in the Render Options (Multilight section).

Apply Changes to Scene

After adjusting the light intensities using Multilight, you can revert those new values back to the scene, preserving those new values for future renders.

Multiple sliders edition 

It is also possible to select several sliders and edit them at the same time. Use Ctrl + click to add or remove sliders to the selection and Ctrl + Shift + click to select a range of sliders to edit them at once (use the Cmd key on OSX). Once several sliders are selected you can move them all at the same time or even type a numerical value on the input filed and it will be propagated to all the selected emitters. Sliders can be sorted on the Multilight panel by their Name, Type or intensity (on the Options>View menu)

The Fast Multilight Preview is disabled by default and has to be enabled manually in the Maxwell Preferences panel. To enable it, simply open Maxwell, and in the File>Preferences panel, enable the Fast Multilight Preview checkbox.

• Fast Multilight Preview: Enables the GPU to perform the slider adjustments interactively.

• Automatic Update After Editing: Enables the CPU (slower but more accurate) to update the image after you finish the adjustment (when you release any slider).

Let’s check out the test video of Maxwell Scene on our server 4 cards rtx 3090.

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Reference Source: nextlimitsupport