Unless someone has a brilliant insight to do this linearly, this can only be done by using an algorithm that is locally aware. Meaning that it knows that there's empty space of a certain size and can pack shapes until there is no more room, much like how a UV packer works. This would require being able to do programming for looping over conditional logic which afaik Substance can't do.
the examples were both made in zbrush. the tiled example was made placing one circle thing at a time. so i told my friend i think substance can do that automatically, but were having no luck reproducing that look.
This is typically where the humain brain performs better than an algorithm. Doing that with a computer would require lots of iterations, and it's unfortunately not possible to do in Designer.
Meaning that it knows that there's empty space of a certain size and can pack shapes until there is no more room, much like how a UV packer works. This would require being able to do programming for looping over conditional logic which afaik Substance can't do.
It wouldn't tile, but I suppose you could send IPackThat tonnes of ngons (maybe randomise their scale beforehand) and disabling rotation but enabling scaling, and let it pack. Then apply the base image using a secondary UV channel or just use a different mesh with the ngons unwrapped around the base image and bake from one to another. Just a thought.
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Doing that with a computer would require lots of iterations, and it's unfortunately not possible to do in Designer.