Mai Ao


About Me

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My Talks

obj-image HIVE
H19 Real-Time Pyro Workflows - Chasing Photorealism
obj-image GDC
SideFX Labs 2021-2022 | Servicing Next-Gen Development
obj-image Tech Talk
The Matrix Awakens: Generate a World

Recent Forum Posts

Static Mesh Skeletal Animation baking - new Labs tool ? May 19, 2022, 9:58 a.m.

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 ( and material function ms_StaticMeshSkeletalAnimation.

It is explained a bit here: []

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.

We will do this in Labs VAT 4.

Labs Flipbook Texture doesn't render March 22, 2022, 2:34 p.m.

I am stuck with this error message...

Error rendering child: /out/pyro_smoker/pre_render
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\", 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?

Can you go to Houdini Text Port and type
echo $OCIO
? What result do you get?

Issue occurred when using flipbook texture node March 21, 2022, 8:13 p.m.


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

Hey, this issue is now fixed in Labs 19.0.566. Sorry about that.