About Rendering

The rendering options let you modify the general aspects of an object.

From the Live Rendering section of the action bar, click Options .

This page discusses:

Display

The display option enables you to select a color space.

The following option is available:

Option Description
Color Space Keeps color consistency.

It can be useful for large color scale screens.

Important: Before using this option, calibrate your screen with a colorimeter hardware.

If you select the custom resolution, the Width and Height options are available.

To change the width and the height simultaneously and keep the image ratio, click .

Rendering Techniques

You can render images either in real-time time with the default visualization, in interactive ray tracing, or in batch mode.

  • Real time uses rasterization techniques.
  • Interactive ray tracing uses optimized ray tracing techniques.
  • Batch rendering lets you benefit from the full power of GI techniques implemented by the Stellar engine.

The real preview of your product aims at being as close as possible to reality but the results always look more realistic in batch mode.

Below is a list of differences that you can expect when preparing your rendered images.

Effect Real-Time Visualization Stellar - Interactive Stellar - Batch
Material Glass Material No refraction Correct Correct
Colored Glass Colored but no absorption Correct Correct
Anisotropic Material Simplified Correct Correct
Emissive Material Simplified Correct Correct
Flakes Simplified Correct Correct
Subsurface Scattering Simplified Correct Correct
Lighting Reflections Simplified Correct Correct
Light Interaction None Correct Correct
Shadows Simplified Correct Correct
Default Ambiences (RMB) As specified As specified Converted to HDRi
Camera Depth of Field Simplified Correct Correct
Glow Simplified Simplified Correct

Iray

The Iray options help you specify options for Photoreal and Interactive (IRT) render engines.

Warning: In 2022x, these engines are only available through a variable. From 2023x onward, they will not be available anymore.

For Photoreal:

Photoreal Option Description
Maximum ray bounces Defines the maximum number of ray bounces.
Important: A low number of ray bounces may produce black areas on reflective and refractive parts.
Instancing Iray supports two ways of handling scene geometry: flattening and instancing. Several modes are available to control how and which geometry is instanced.
  • Off: all scene geometry is flattened into a single memory block. Geometry that is instanced multiple times in the scene is duplicated. This mode almost always leads to higher memory use than when defining Instancing to On, but often yields higher rendering performance.
  • On: all instanced geometry only exists once, which means that input scene instances are also instances in the rendering core. This may yield a significantly lower memory footprint, but may incur significant runtime costs, especially if the geometric extent of the instances overlaps. Iray also applies incremental object transform updates. This mode significantly reduces the scene preprocessing runtime overhead when moving objects around dynamically.
  • Auto: Iray automatically detects and decides which objects to instance to reduce the memory footprint, and accelerate object transform updates. Input scene instances are usually all instanced in the rendering core, unless there is a significant downside for memory or performance. This mode may significantly reduce the scene preprocessing runtime overhead when repeatedly changing the transformation of a group, or (flattened) instance.
Texture Compression Activates or deactivates texture compression.
  • Off: no compression.
  • Medium: an average compression is applied.
  • High: a high compression is applied.
Boost Caustics Renders caustics more accurately but with some performance penalty.
Apply denoiser after iteration Converts a noisy image into a smooth image and improves convergence time for a rendering.

Different denoisers are used, depending on the render engine:

  • Denoiser 1 for Photoreal or IRT, real time, or batch
  • Denoiser 2 for Stellar in interactive mode
Image Quality Speed Hardware
Denoisers 1 and 2 provide equivalent quality. Denoiser 1 is the fastest. Denoiser 2 is slightly slower. Denoisers 1 and 2 are GPU-only.

The following option is available for Interactive:

Interactive Option Description
Path space filtering Applies a filter (the image is blurred) that removes noise.

Hardware

The hardware options let you select the render mode.

You can select hardware for the following render modes:

  • Stellar: a high quality, physically-based render engine designed by Dassault Systèmes that you can use during the design phase in another app than Live Rendering.
  • Photoreal: a high quality, physically-based, path-tracing render mode generates images featuring complex global illumination effects.
  • Interactive: uses faster but less accurate rendering algorithms than the Photoreal render mode.

Miscellaneous

The miscellaneous options help you specify the logo and navigation options.

Option Description
Insert logo in saved images Adds a logo to the lower-right corner of saved images.

Logos are located in ..\install_directory\win_b64\resources\graphic\logos.

You can replace them.

Navigation Defines the quality of the image, depending on your hardware.

The higher the quality, the slower the performance while moving an object.

If your hardware is not powerful, decrease the quality to maintain a fluid navigation.