Typically slicers place seams based on analysis of the geometry of the object being printed. Sharpest Corners or similar are common ways to try to avoid showing seams.
However, another technique could be to use Ambient Occlusion (or similar - raytracing perhaps?) techniques to see what parts of a model are least visible, and place seams where seams would be least visible. e.g. the example below:
The seam would likely be generated at the hard 90 degree corner in the bottom left of the screenshot. However, the seam could conceivably be placed on the interior of the inner loop, as AO would consider that the darkest part of the model, and so, least visible.
Why is this useful?
Hides seams and increases print quality.
not necessarily that useful for engineering prints, but could be very useful for “aesthetic” models (e.g. zbrush sculpts, etc)
- Do other slicers do this?:
Not as far as I’m aware