UV Unwrap causing Curvature and AO errors

georgespanswick · Nov 2018

Not sure whether my UVS are wrong or I have wrong settings when baking in Substance Painter but I am coming out with some serious curvature an AO issues - any help appreciated! Anyone know the reason?

Image: https://us.v-cdn.net/5021068/uploads/editor/3c/qc6z423z6a91.png

Image: https://us.v-cdn.net/5021068/uploads/editor/ez/yc8h04c0ue14.png

poopipe · Nov 2018

that's pretty much what i'd expect given the mesh, a low texel density and bugger all padding

georgespanswick · Mar 2019

Cheers

Sage · Mar 2019

The issue is that scale of your mattress UV islands are too small. It's only using a few pixels of your texture. There are a few things you can do to improve this.

Scale up your uv islands in a uniform way so you take advantage of your uv space.
Arrange your uv islands so they use up as much of your uv island as possible.

I would overlap uvs that are going to use that same texture. The issue with that however is that you need to offset the overlapping uvs to be able to bake your model properly.

here is an example of what I mean
https://www.youtube.com/watch?v=G9X5KJ_RVmw

https://www.youtube.com/watch?v=gpJljeSH9Bs

georgespanswick · Mar 2019

Sage said:

The issue is that scale of your mattress UV islands are too small. It's only using a few pixels of your texture. There are a few things you can do to improve this.

Scale up your uv islands in a uniform way so you take advantage of your uv space.
Arrange your uv islands so they use up as much of your uv island as possible.

I would overlap uvs that are going to use that same texture. The issue with that however is that you need to offset the overlapping uvs to be able to bake your model properly.

here is an example of what I mean
https://www.youtube.com/watch?v=G9X5KJ_RVmw

https://www.youtube.com/watch?v=gpJljeSH9Bs

Thanks that's brilliant, I've watched the videos and it's explains everything perfectly. Thank you for spending so much time to go through my problems and I now understand it all ! More people like you needed around here!!

UV Unwrap causing Curvature and AO errors

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