Mesh only holding texture on certain faces

[maria.ada.quintin]

I’ve run into an issue with a character bust model after modelling arms for it. Now when I apply the texture, it only shows on the lower part of the arms and nowhere else. When I bring it into Substance Painter, the UVs won’t read at all.

What I’ve Tried:

- reversing the problem faces 

- creating new UVs

- restarting Maya/my computer

- using quad draw to delete individual faces and put them back. This works for individual faces. This identified that it’s a problem with the geo.

Does anyone know how I can fix this?

[damaggio]

can you upload a part of the model here please.

[maria.ada.quintin]

I’ve updated my post to include the file. Thanks for your quick response!

[damaggio]

Why did you create a second UV map? 

[maria.ada.quintin]

I wasn’t aware that I had a second UV map. How can you tell?

[damaggio]

You made a bunch of errors Maria, didn't you take a course or watch a Tutorial?

Also Maya by default does not create a second UV set, it has to be set manually to avoid people making mistakes.

If you are planning to become a professional you need to pay more attention, If you already painted your maps now  you gonna have to paint all over again.

[maria.ada.quintin]

I attended college for 3 years to enter this field, and have been actively working for an additional 2 years. However, I am not a Modeller, which has prompted my request for help. I am a Lighting and Texture Artist.

I still don’t understand how I managed to make the secondary maps, what specific errors I made or how to fix them.

I’m not overly concerned about re-painting the maps, as I am only in the beginning stages of this project. 

I’d appreciate if you could please let me know how to fix this if you don’t mind.

[damaggio]

I would highly recommend taking a course online, 3D is not easy to understand and I see the same 

mistakes just like yours every week here in the Forums .

What resolution did you paint in Substance and why did you use UDIMs?

[maria.ada.quintin]

Thank you for the recommendation. However, my focus is not on becoming a Modeller, nor was I inquiring about my proficiency in that role. My request is specifically for assistance in resolving this particular error.

If identifying the errors you mentioned is beyond your scope, please let me know so I can seek assistance elsewhere.

[damaggio · Accepted solution]

Here are a couple of notes to help you

1- Don't create a second UV set until you understand how to use them.

2_ UDIMs are for high resolution textures for professional models, you can paint your character with only one map 4k or 8k that should be enough for most works.

3- Your texel density is incorrect, you have a lot more resolution in the face than in the hands, if the character touches her face you gonna notice a difference, same for close ups of the hands.

4- there is one UDIM tile being wasted for the back of the head....unless she's gonna be a bald lady.

5-You need to assign your textures to the right UV set and delete the other one, UV editor >UV sets

Hope that helps and good luck with the rest of the project Maria.✌️

[maria.ada.quintin]

Thank you for your notes.

I resolved the issue by importing the file into Houdini and using an Attribute Delete node to remove the second UV set. This solution worked, a d the origin of the second UV set remains unclear as I didn’t intentionally create it.

I should mention that your suggestion to take a course in response to my inquiry was disheartening, as I didn’t understand why. In the future, it might be more helpful to first ask if I have addressed the texel density, as I hadn't yet done so and didn’t realize it was your major concern.

Additionally, checking the UV set menu would have also resolved the problem, so I appreciate that suggestion. Thanks for your help.