Multiple uv sets, packed geometry

[zenop]

Hi,

Is it possible to use multiple UV sets in htoa on packed geometry?

Currently I have a secondary uv set named "uv2". If I use "uv2" in the uv set parameter of the image shader it only picks it up if the geometry is unpacked. I would expect the vertex attributes to be carried the same way as the point attributes when the geometry is packed?

How should I be doing this?

Thanks,

Zeno

[julian.hodgson]

This should work, for example the included file has two uvsets, the geometry is packed, but it's unpacked at render time and uses the uv2 set.

packed_uv.zip

Do you have a different situation?

[zenop]

Hi Julian,

Looking into this some more. It does work when using your method. However, when I export it through an alembic rop & load it back in, it doesn't pick up the uv2 set. I didn't change any settings in the alembic rop/import.

Any idea why this could be happening?

Zeno

,

Hi Julian,

Your example does work. I will try and replicate it since it doesn't work on my end where it's read through an abc cache.

Will investigate, thanks for the working example.

Zeno

[Anonymous]

set Face sets to Save All Groups As Face Sets in rop_alembic/Geometry

[julian.hodgson · Accepted solution]

For the alembic, you need to specify the extra uv set when exporting e.g.