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How to change UV flow


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The issue is the way those corner surfaces were modeled. Look at where the ISO lines (UV Grid Lines) originate from. The "midpoint of the curved edge" appears to be where the surface "origin" is. Swapping UV won't redefine the intrinsic "origin" of the grid lines, just swaps them so the U or V lines now "align" with the adjacent surfaces, but in this case, the best way to fix this issue is simply to use Net Surface and build new ones.

Go into Net Surface. Be sure you are in "full chain mode". Even though you are in Full Chain, the surface creation function is smart enough to search for the branch points and stop.

For a "4-edge surface", you simply start at any side of the chain, click one section, and then follow the chaining around in the same chaining direction, to pick the 4 sides. (go all CW or all CCW.)

For a 3-edge fillet like this, pick one wall edge, with the chain going "towards the point" at the bottom. 2nd, pick the far fillet edge, again pointing from the "top" to the bottom. Finally, select the 3rd chain as the top edge, going either direction, doesn't matter. After picking the 3 chains, press "ok", and Net Surf will create a 3-edge blend surface. Simple and quick, and the ISO grid lines will line up. (and can be swapped if needed)

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I'm old, been using the software since about 1992 and would use Coon Surface for this. :rofl:I had a REALLY good teacher at the local community college when I was learning the software and he made Coons Surface really logical for me. 

I've NEVER been able to get Net Surface to work... maybe it'll work for you.

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6 hours ago, cncappsjames said:

I'm old, been using the software since about 1992 and would use Coon Surface for this. :rofl:I had a REALLY good teacher at the local community college when I was learning the software and he made Coons Surface really logical for me. 

I've NEVER been able to get Net Surface to work... maybe it'll work for you.

Ditto.  I just made some Coons surfaces yesterday to make a smooth flowing continuous surface on some undercut channels.  Could be the old-dog-new-tricks thing but I've never had good luck with Net surfaces.

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On 5/27/2023 at 7:17 PM, Matthew Hajicek - Singularity said:

Ditto.  I just made some Coons surfaces yesterday to make a smooth flowing continuous surface on some undercut channels.  Could be the old-dog-new-tricks thing but I've never had good luck with Net surfaces.

the selection order of the chains is important when creating net surfaces

i made a short video on my channed of creating a net surface showing the gist of it

 

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