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Padding overlapping empty UV islands


Findus
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Not sure if I should log this as a bug, but if I export a layer and part of it is transparent, then the padding will overlap empty UV islands if it's big enough. When reimported, these padding artifacts then show up on the model. This can obviously be prevented if the padding width is set accordingly, but generally I'd expect the padding to respect UVs, because that's something that's easily overlooked.

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  • 11 months later...

Workaround:

And how does it look if you look at the exported texture in another 3d program? like, an engine for instance.

If you go to Edit->Preferences in 3D Coat and then set Padding to Never (or Manual Selection and then click No after exporting the texture) 3D Coat will export the texture without inpainting in the UV gutters. You can then export each of your material's textures with no inpainting (I recommend PNG for this particular task) and import all of those images in your favorite 2d image editor as a layer with Normal blending mode. After you've merged this image you'll need to run an inpainting filter like Solidify, which is a good idea because it makes the lower-resolution mipmaps of the texture look correct on the UV seams. For Krita you can use Filter->G'MIC->Repair->Inpaint (Solidify). It's a bit slower than the Photoshop filter I linked but it works well. In the future it might be better to use just one material slot as you won't have this extra step to deal with.

 

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