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Hi everyone,
I have unwrapped a model following the automated process.
I have checked the normal map in S3DP: it looks good and has black background between the islands.
After exporting it, I've got a different map having purple/blue color for background with artefacts.
The question is: is there any setting allowing to get black background between islands, like in S3DP, after export?
I think it would be better for visualization.
Thanks a lot!
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Any idea maybe? Thanks.
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Check your padding settings in Export >Settings> Global (and by individual texture set if overridden). The screenshot you show is expected when padding is set to dilation infinite.
Dave
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Hi,
Thanks for reply.
Unfortunately it doesn't solve the issue.
I tried first "Dilation + Transparent" and then the other options.
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Can I ask what is to solve? The use of padding (dilation) is both expected and normal practice as it avoids issues along the seams with mipmaps.
Dave
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Sure.
When I import the textures, the space between the islands is not black, it is purple as shown on the first screenshot I uploaded.
I have a black color in Substance 3D as shown in the second screenshot.
Dilation is infinite but when I change it to transparent it doesn't solve the issue.
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Having no dilation and black right up to the UV edges can cause visible issues in the seams when rendering. To rephrase my question - what issue are you having by not having them black?
Dave
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If you say that having black color between islands could be an issue for rendering, in this case we can keep it so.
My last question is: why are there such artefacts and not uniform purple color?
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The padding works by extending the colour outward from the edges, so whatever colour is on the normal map edge pixels is extended outward into the unused UV area. If a standard normal colour was used then that would also potentially show as a seam artifact on rendering.
Dave