SurajShettigar
Hello!

I have been trying to wrap my head around the Rigidbody VAT3 Shadergraph for Unity. The Min and Max Bounds has some sort of magic values which makes the simulation work correctly. Changing it slightly breaks the whole simulation. I checked the shadergraph of URP which is quite different than the shader code for standard pipeline.

I followed this tutorial [youtu.be] to create a Rigidbody simulation. Only when I use the values provided in the example project for Bound Min and Max, it seems to work.

I am trying to recreate the shader and have not been able to understand the bound related calculations in the shader.

zachagreg
Hello, I recently attempted to use mapbox to grab some map data. However, I am unable to even get passed API key input. After inputting my key and hitting refresh on the node, Houdini begins to compute and then errors with this message.

Traceback (most recent call last):
File "labs::Sop/mapbox::2.1/refresh", line 1, in <module>
File "labs::Sop/mapbox::2.1, PythonModule", line 39, in update
File "labs::Sop/mapbox::2.1, PythonModule", line 167, in refresh
File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.383/houdini/python3.7libs\hou.py", line 16462, in cook
return _hou.Node_cook(self, *args, **kwargs)
hou.OperationFailed: The attempted operation failed.
Error while cooking.

Currently I am on Houdini 19.0.383 py3

Unfortunately, I have no idea what is going on within the node to diagnose the issue any further. Any suggestions or others running into this?

papsphilip
I am also struggling to make the baked height work. in my case i have a complex rock i want to bake small details to the low version.
Its difficult to guess the height range and the trace distance.
Iterations are not quick because it takes a while to bake.
Is there a way to know these values in a more precise way?
some sort of visualizer would be helpful to see the correct height range.

a lot of the times the height map is noisy, is that because of my geo or the map resolution?

darkPrince
Hi!

I was wondering if the workflow has changed for Unreal Engine 5? Especially for the fluids/dynamic remeshing vat? I'm currently using Houdini 19.0.455 and UE 5.0.2. I did follow all the steps but still don't get a clean mesh.

Image Not Found

The same vat works perfectly on UE 4.27.2 though.

I'd greatly appreciate your help.

Cheers!

ankoro
Official Labs Vertex Animation Textures 3.0 FAQs and Linksでしばらく回答が無いようなので、
新たなスレットにさせてもらいました。

Official Labs Vertex Animation Textures 3.0 FAQs and Linksで一ヶ月半前に質問されていた、
Fluid VATのエラーについて19.0.622に含まれていた5.0のsideFX LABでEAが取れていたので試したところ、
まだエラーが継続されていたようでした。

いくつか検証したところエラーの問題はmeshのimportにあるようでした。
これはunreal engine5の問題なのでしょうか？
それともプラグイン側の問題なのでしょうか？？



Official Labs Vertex Animation Textures 3.0 FAQs and Links hasn't answered for a while, so I decided to make it a new threat.

Asked a month and a half ago in the Official Labs Vertex Animation Textures 3.0 FAQs and Links,
About Fluid VAT error I tried it because EA was taken with 5.0 sideFX LAB included in 19.0.622.
It seemed that the error was still going on.

After some verification, the error issue seemed to be in the mesh import.

Is this a problem with unreal engine 5?
Or is it a plugin issue? ??

WANGHAN
Hi, I'm trying to import a liquid simulation from houdini to Unreal 5 using VAT but my mesh is changing ever time and full of hole?Why?

rendereverything
Hello. I recently discovered alternative approach to VAT (vertex animation textures) for skeletal meshes. It is already included in Unreal Engine in form of 3DsMax Script (StaticMeshSkeletalAnimation.ms) and material function ms_StaticMeshSkeletalAnimation.

It is explained a bit here: https://vimeo.com/266582237 [vimeo.com]

The idea is to bake a texture that holds bone assignments for each vertex. Then bake bone animation to separate textures.
This way animations can be shared between different meshes .
Also animation texture sizes are much smaller as it only requires 2 pixels per frame per bone to store.

This sounds like a great idea and it would be cool to have support for it in Labs.

chf
I am stuck with this error message...

Error 
Error rendering child: /out/pyro_smoker/pre_render 
Warning 
Python error: Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "labs::Driver/flipbook_textures::1.0, PythonModule", line 1321, in renderAndExport
File "labs::Driver/flipbook_textures::1.0, PythonModule", line 1109, in renderAll
File "labs::Driver/flipbook_textures::1.0, PythonModule", line 1097, in renderAll
File "labs::Driver/flipbook_textures::1.0, PythonModule", line 566, in renderFinalColor
File "labs::Driver/flipbook_textures::1.0, PythonModule", line 554, in renderFinalColor
File "labs::Driver/flipbook_textures::1.0, PythonModule", line 483, in setColorSpace
File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.561/houdini/python3.7libs\hou.py", line 74509, in setOCIODisplayView
return _hou.SceneViewer_setOCIODisplayView(self, display, view)
hou.OperationFailed: The attempted operation failed.
Invalid display or view name

any suggestions on what might be the problem?

echo $OCIO

ankoro
Hi!

I'm getting the above error too.

In my case Final Color, Non-Emissive is output.
But then I get an error.

This symptom did not occur when I set the aces color space,
but I have to use it with gamma 2.2.

flipbook _texture node is very fast and nice so I hope this problem is solved！

Thank you

chris_yang
Hi,

I'm running into a similar problem with this ROP.

Error
Error rendering child: /out/flipbook_textures1/pre_render
Warning
Python error: Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "labs:river/flipbook_textures::1.0, PythonModule", line 1321, in renderAndExport
File "labs:river/flipbook_textures::1.0, PythonModule", line 1109, in renderAll
File "labs:river/flipbook_textures::1.0, PythonModule", line 1099, in renderAll
File "labs:river/flipbook_textures::1.0, PythonModule", line 889, in renderMDC
File "labs:river/flipbook_textures::1.0, PythonModule", line 829, in renderMDC
File "labs:river/flipbook_textures::1.0, PythonModule", line 500, in setColorSpace
AttributeError: 'GeometryViewport' object has no attribute 'setSceneGamma'


Renders the Final Color, Non-Emissive Color, and Depth passes.
But Errors out on the MDC , Surface Normal, and Motion Vector passes. image.png

winterlang157
Hello MaiAo,

Pardon me for keep spamming question soo much.
I see this another error message that pops up when I hit the Export all texture button.

Image Not Found

Would u know how to solve this issue?

Thanks in advance.

winterlang157
Hello MaiAo,

Nice to finally get your help on this matter
I tried to check for the Loaded Packages, I cant seem to find it.
I'll provide the snapshot of the details shown on the Houdini I'm using.

I've also tried uninstalling Labs and update the latest build of Labs too.
still getting the same error message when I hit render.

Am I doing smthing wrong? I would really like to learn how to use this amazing tool if you could help guide me on this.

Looking forward to your reply.

echo $SIDEFXLABS

Noboru
I am having some strange problems with flipbooks and emission in UE4. If I compile my own BASIC UE4 shader with Just Final Color and Emission and none of the advanced material functions my material looks fine in playback. But when I have emission and use either the basic or advanced UE4 materials I get flickering in the emissive part of the material which is increasingly more noticeable when played slower. I have tried to adjust the motion vector settings on the material and even disabled all the motion vector features. I have exported the HDR motion vector in the form of exr to get more accurate interpolation and it still occurs.

If I turn of emissive intensity or set it very low the problem goes away but so does my emissive texture.

Polybud
Good day everyone!

Do we have any information on Reality Capture Labs node pack? Since Houdini is semi part of Epic ecosystem and Reality Capture is fully integrated into Epic's ecosystem, can we except some future update due to RC node pack inside Labs?

What we can except due to GoZ, now that Maxon stepped in?

What is the case with Exoside quad remesher? I can not install/update it by using Lab's node (the download process seems to take forever and I can not interrupt it without crashing Houdini)Downloading it from official Exoside website also impossible.

Thanks in advance if anyone from Labs team can update us!

winterlang157
Hello everyone,
I'm having issues & errors like this when using the Flipbook texture node atm.
Not quite sure why these errors are occurring & the node is in beta & new to me as well.
Can any1 help provide some guidance & help on this matter? (referring to snap01 & snap02 image)

I'm also trying out the tool itself for making a texture sheet from flipbook.
Looking back at the released video. They are using these 2 wrangle node to make motion vector & normal look.
Any1 know what would be the coding behind these 2 wrangle that give the motion vec & normal effect? (referring to snap03 image)

Much appreciated & thank you in advance for the provided guidance & help!!!

Under_Pressure
I also tried to export groom attribute 'uv'('groom_root_uv' in unreal) through + or as different combinations to unreal.

it's not working at all.

nadmai
Hi
I'm using VAT 3.0 to unreal 4.26. I can export normally fine, but when I've tried to export for use with Niagara mesh the mesh appears covered in holes. I've followed the guides on artstation accurately as far as I know so any pointers would be appreciated!

infinate
Hello,

I am attempting to use the provided VAT3_Tutorial_Simulations.hip with H19.0.455 to generate the cloth/soft body simulation and export to Unity URP 2021.2.5f1.

After setting up the Unity assets (mesh/textures/material) following the video instruction, the mesh appears black in the Unity viewport and does not animate. No errors are displayed in the console.

Any suggestions on how to proceed? Thanks!

PAI_SideFX

Ambrosiussen

https://www.youtube.com/watch?v=J_dUTntd8lA [www.youtube.com]

Referring to this video, I think It is possible to animate your Houdini asset using some controller in real-time game play mode too. I think it doesn't converts into a Static mesh totally. (I could be wrong in my explanation)

But What my question is this asset I am trying to use in Unity 3D as a HDA. But I don't get any noise animation in the both scene view and Game view. But If I toggle the "animate Noise" custom Parameter I created in Houdini inside Unity 3D scene editor, I see some change in the noise.
What I am trying to create is a animated Low poly wave FX. Its very simple I think.

Please Let me know If there is any way possible to animate in Unity in runtime as well.


I am using Houdini 19.0.383
Using Unity 3D 2019.4.20f1 Version.