TressFX 4.0 hair rendering

lion032 · June 29, 2017, 9:20am

What I basically did is to rewrite AMD’s TressFX library and shaders using UE’s rendering system.

Given that I don’t use 3Ds max for TressFX asset creation I have no immediate plans to write a 3ds max plugin.

charles_interface · August 5, 2017, 9:54pm

Wow … and how does that rewrite the libraries in the EU rendering system?

ajbombadill · August 26, 2017, 11:08am

Wow, this is amazing, I am going to try this out for sure, thanks for the info!

formalin_chips · April 20, 2018, 8:58am

Hello Lion,

I have met the same bug as Mayne said on your branch TressFX and TressFX-4.16.
And I have tried compiling branch TressFX-4.17 but fail.
So how can I get the fixed version？

Thanks

WWWWWWWWWWWWWWWWWWWW · May 5, 2018, 7:31pm

@lion032
https://github.com/lion03/UE4-K4W-Pl…e/TressFX-4.19
Visual Studio 2015.3
Build Error…

lion032 · May 6, 2018, 6:34am

it is initial rebase and it is not functional yet.

lion032 · May 6, 2018, 3:49pm

[USER=“15214”]Aabs Inc.[/USER] now the functional version is up.
https://github.com/lion03/UE4-K4W-Plugin/tree/TressFX-4.19

WWWWWWWWWWWWWWWWWWWW · May 6, 2018, 8:02pm

@lion032
Thank you!

Visual Studio 2015.3
Visual Studio 2017 version 15.6.7

New version
\Engine\Source\Editor\UnrealEd\Private\Factories\TressFXFactory.cpp(454): error C2065: ‘IMainFrameModule’: undeclared identifier
\Engine\Source\Editor\UnrealEd\Private\Factories\TressFXFactory.cpp(454): error C2065: ‘MainFrame’: undeclared identifier
\Engine\Source\Editor\UnrealEd\Private\Factories\TressFXFactory.cpp(454): error C2672: ‘FModuleManager::LoadModuleChecked’: no matching overloaded function found
\Engine\Source\Editor\UnrealEd\Private\Factories\TressFXFactory.cpp(454): error C2974: ‘FModuleManager::LoadModuleChecked’: invalid nontype template argument of type
\Engine\Source\Runtime\Core\Public\Modules/ModuleManager.h(303): note: see declaration of ‘FModuleManager::LoadModuleChecked’
\Engine\Source\Editor\UnrealEd\Private\Factories\TressFXFactory.cpp(455): error C2065: ‘MainFrame’: undeclared identifier
\Engine\Source\Editor\UnrealEd\Private\Factories\TressFXFactory.cpp(455): error C2228: left of ‘.GetParentWindow’ must be a class, struct or union
\Engine\Source\Editor\UnrealEd\Private\Factories\TressFXFactory.cpp(455): note: type is an ‘unknown-type’
========== Build: 3 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

lion032 · May 7, 2018, 10:27am

[USER=“15214”]Aabs Inc.[/USER]
Will push fix later today

WWWWWWWWWWWWWWWWWWWW · May 7, 2018, 11:27pm

@lion032
Thank You!
========== Build: 4 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========

・Please “how to UE4-K4W-Plugin-TressFX-4.19” and “Sample Projects”.
・Multiplatform support or DirectX only?

lion032 · May 8, 2018, 5:25am

“How to” currently will be ineffective due constant design changes.
About example project I need with AMD first because I am using their sample assets.

WWWWWWWWWWWWWWWWWWWW · May 9, 2018, 9:19am

OK!

Multiplatform support or DirectX only?

lion032 · May 9, 2018, 11:27am

In theory every platform that supports compute shaders

WWWWWWWWWWWWWWWWWWWW · May 19, 2018, 11:24am

@lion032
Build(Visual Studio 2015)
New Project -> Blank

Packege Project -> Windows(64-bit)
UATHelper: Packaging (Windows (64-bit)): BUILD SUCCESSFUL

Packege Project -> Windows(32-bit)
UATHelper: Packaging (Windows (32-bit)): BUILD FAILED

/UE4-K4W-Plugin-TressFX-4.19/Engine/Source/Runtime/Engine/Private/TressFXSceneProxy.cpp(137): error C2719: ‘rotFromXAxisToWindDir’: formal parameter with requested alignment of 16 won’t be aligned

lion032 · May 19, 2018, 12:16pm

I’ll investigate.

WWWWWWWWWWWWWWWWWWWW · May 20, 2018, 4:09pm

“SamplerMask”
RHISetBlendState(FBlendStateRHIParamRef NewState, const FLinearColor& BlendFactor, uint32 SamplerMask)
or
“SampleMask”
RHISetBlendState(FBlendStateRHIParamRef NewState, const FLinearColor& BlendFactor, uint32 SampleMask)
or
“”
\Engine\Source\Runtime\RHI\Public\RHICommandListCommandExecutes.inl
INTERNAL_DECORATOR(RHISetBlendState)(State, BlendFactor);
?

Daniel_Skipper_Games · May 30, 2018, 9:30am

Hi lion032.

Would it be possible for you to host a known to work set of the .tfx* files (even if they were just a cube with hair) to use for test imports?

The reason I ask is I’ve just merged your TressFX engine code into my custom engine version however my own .tfx* files are crashing the editor and it would be really useful to have some known to work files to check whether it’s the merge or if (as I suspect) it’s my .tfx files.

Thanks.

lion032 · May 30, 2018, 12:08pm

I need to check that with AMD since I modified their assets.

WWWWWWWWWWWWWWWWWWWW · June 21, 2018, 8:01pm

Hi @lion032
UE4.20 support?

Daniel_Skipper_Games · July 31, 2018, 2:46pm

Hi,
The problem that the 4.16 version had with deferred decals not rendering appears to be happening in the 4.19 version.

I did try to work out which part of your June 29th commit which fixed the problem in the 4.16 version was, but I failed miserably.

Also the global clip plane is still causing the engine to fail to load if enabled with tressfx implemented.

Did you ever get a response from AMD about releasing the modified assets?

I’d have thought they’d have come under AMDs TressFX licence on github but I understand why you’d want to check with them first to make sure.

As I said all I really need is a hairy cube that you know works on your own compiled version as a check to see if the code compiled successfully enough to work.

Also in the DepthOnlyVertexShader.usf file at around line 70 the code has #include “Tessellation.usf” however tesselated materials fail to work as they can’t find this file, it works if I change it from usf to ush though.

Thanks,