The TressFX library is AMD’s hair/fur rendering and simulation technology. TressFX is designed to use the GPU to simulate and render high-quality, realistic hair and fur.

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Features

High quality anti-aliasing

Samples and documentation

Autodesk® Maya® plugin

Open source, MIT license

Designed for optimized rendering and simulation.
Available as a stand-alone sample, and as a patch for Unreal Engine.
Hair and fur support, with high quality anti-aliasing.
Animation/skinning support.
Brand new LoD system.
Extensive documentation and tutorials.
Autodesk® Maya® plugin provided for hair/fur and collision authoring.
Full source code provided.

Meet TressFX 5.0!

This brand new version of TressFX has been developed for Unreal Engine 4.26 and 4.27, though we will support UE5 in the next revision.

In this version, we have improved the Maya exporter to handle more complicated animation assets, with support for up to 16 binding bones. We have also improved the asset editors and visualization tools. Lastly, we have enhanced light handling for TressFX, including cast/receive shadow implementation support for more rendering features in UE4 (TAA, SkyLight, Marschner Shading Model) which are more compatible with the Unreal Engine rendering pipeline.

To access the links below, you must be a registered Unreal Engine developer with access to the Unreal Engine GitHub repository.

TressFX 5.0 arrives as a patch for Unreal Engine

UE4 TressFX 5.0 has been designed to build upon the many features of UE4 TressFX 4.1, while being much easier to use. Find out what’s new!

Watch the video

If you’d like to know more about UE4 TressFX 5.0, watch our brand new video presentation (opens in YouTube) which goes into much more detail. You can also download the slides.

Unreal Engine 4 TressFX 5.0

Watch our video explaining what UE4 TressFX 5.0 is, and how to use it. TressFX is designed to simulate and render realistic hair and fur.

Introducing SUA - demonstrating AMD TressFX

We are very excited to present On Mind Inc‘s Digital Human SUA.

Comparison

Video: Chinese Martial Arts game 逆水寒（Justice) by NetEase has a stunning use of AMD TressFX

Play Video

Are you an Unreal Engine developer?

The Unreal version of TressFX now supports 4.26.

Version history

Version 4.0 (April 2017)

Hair is skinned directly, rather than through triangle stream-out.
Signed distance field (SDF) collision, including compute shaders to generate the SDF from a dynamic mesh.
New system for handling fast motion.
Refactored to be more engine / API agnostic.
Example code includes compute-based skinning and marching cubes generation.
DirectX 12 support.

Version 3.1 (May 2016)

The biggest update in TressFX v3.1.0 is a new order-independent transparency (OIT) option we call “ShortCut”. It has bounded memory and potentially higher performance than the full per-pixel linked list (PPLL) method. Note, though, that it does not give quite the same quality result as the PPLL method, and thus represents a memory/performance vs. quality tradeoff.