Still just trying to be helpful

Lets say we made a dynamic flag
If we tri'ed the quads in to 2 tri's then that would be correct.

If we Tri'ed the flags quads by 4 and had that vertices in the center of all the Tri'ed quads
then when we blew wind at it.

That vertices in the center of all the Tri'ed quads ,would bubble.

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The Artist that will fight for decades to conquer their media.
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Dark Sphere Mage Vengeance