One model with multiple UV sets

[JPeters]

Hi there,

I've got a question related to multiple UV sets on a model, in this case combined with corona hair.
On the cheetah model I've made, I've got two UV sets:
1) "HD" set with 8 UDIM's for high resolution displacement and texturing on the skin and potentially the color of the fur.
2) "SD" set with 1 one UDIM specifically for grooming purposes, so for the kink, fizz etc. maps.
These tags are both on the model, HD first and SD second.

I want the maps in my corona hair material to look at the 2nd "SD" UV set, not the primary "HD" set. I thought that I needed to go into the Corona Bitmap material, enable "Override UVW" and then set the "UVW channel" to 1 (1 being the second UV tag, 0 being the first).
This does not seem to work as expected. If I set "UVW channel" to 0, it uses the HD UV's but setting it to 1 doesn't use the SD UV's.

My question is, is it possible to use multiple UV sets like this and if so, how? The description under the FAQ for Corona Bitmap is very sparse and does not explain these parameters.

Cheers,

[JPeters]

No one?

[JPeters]

Friendly bump for this question.

[bnji]

Hi Jpeters,
Thanks for reaching out to us, and sorry for the late reply.
We've a similar report and it has been logged.
The dev team already has it in their to-do list to find the best approach.
In the meantime, perhaps you can just move the material tag one or more positions to the right (as much as you need) as long as the material tag that will be using the 2nd UV set is not before the 1st UV tag.
I hope this helps.
If further assistance is required, please share with us your scene project.
Kind regards.

[JPeters]

Hi Bnji,

Thanks for the reply, to make my question more concise:

My model has 2 UV sets, UV1 which is the HD (multiple UDIM's) UV's for the textures and UV2 which is a single UDIM for the grooming.
I would like my skin/eye/nails shader to use UV1 and my hair styling/grooming object to use UV2.

How do I get this to work?
As I mentioned setting the Corona Bitmap material in the hair object to enable "Override UVW" to a different UVW channel does not seem to work...

Cheers,