Redshift Real Time

Redshift Real Time is currently in beta and only in Windows with an Nvidia RTX GPU.

Due to the current limitations of Redshift Real Time, it is recommended that RS RT be used with new scenes as you are likely to find incompatibility with many shader networks found in pre-existing scenes.

macOS is not currently supported.

Redshift RT Render Settings

Page Table Of Contents

General


Redshift Real Time Render Time: 4s	Redshift Production Bucket 1m 35s

Redshift Real Time Render Passes: 128	Redshift Production Interactive 128

Redshift Real Time (RT) is the fastest interactive rendering engine available in Redshift, offering near real time updates. The speed and interactivity of Redshift RT makes it an excellent option for look development, scene layout, and light placement. Additionally, Redshift RT is designed to match Redshift's Production rendering engine as closely as possible, making it ideal for quickly switching back and forth between the two to make the most of each engine's strengths.

Redshift RT supports Render View undersampling to increase interactivity and an experimental version of per-pixel displacement. The latter can be used in the same manner as setting up displacement for Redshift Production, however, it does not require the underlying mesh to be sufficiently dense for detailed displacement results. In the example below, the sphere only has 72 faces and the ground plane only has 100 and yet displacement is extremely detailed.


Wireframe overlay without displacement	Displacement without tessellation
Textures from Polyhaven.com

Using Redshift RT

Redshift RT can be enabled directly from the Redshift Render View or from the render settings menu as pictured in the images below.

The option to switch the rendering engine from Production to Real Time in the render settings can be found at the top of the Basic Settings section or in the Sampling tab of the Advanced Settings.

Switching to Redshift RT from the Render View by clicking on the 'RT' icon

Switching to Redshift RT from the Render Settings

Switching to Redshift RT from a Viewport's 'Redshift' menu

Render Settings

Redshift RT has its own render settings section. Please see the Render Settings - RT - Basic page and the Render Settings - RT - Advanced pages for more information.

When using Redshift RT the primary setting that affects render quality is the number of Progressive Passes and the global Trace Depth limits. Redshift RT has a maximum trace depth limit of 4.


Progressive Passes: 1	64

Limitations and Unsupported Features

Known Bugs

Normal Maps are flipped

Shading Features

Back-Lighting / Translucency
- Redshift Material: Supported
- Standard Material: Unsupported
Subsurface
- Raytraced SSS
- Single Scattering
- Point Cache Based SSS
- Subsurface GI
Volumes
- VDB Volumes
- Global Volume Fog
Matte Features
Sprite Shader
Displacement (experimental per-pixel displacement)
Nested Dielectrics
Per-Shader Trace Depth Limits
User Data

Object Level: Supported
Vertex Level: Unsupported

Geometry Features

Proxies

Lighting Features

Light Linking / Trace Sets

General Features

AOVs
Motion Blur
Point-Based GI
Caustics
Multi-GPU Support
Non-Standard Camera types (Fisheye etc)
Maximum Trace Depth: 4
Redshift Material Override

Hardware & Software Requirements

Windows 10
- Version 2004+
- OS Build 19000+
Nvidia RTX GPU