# How does one go about making non-planar tris?

#1

Heh this isn’t a stupid question, somehow I managed to do it. I tripled a very complex object and ended up with non-planar polys. Can’t explain it. If I delete them, nothing appears to be missing, but it’s possible I just can’t find them.

Has anybody ever run across this? It’s not a life or death deal, just a point of curiosity.

#2

theoretically impossible. One exception, if three points are perfectly aligned. They belong to an infinite number of plans… Not only one.

#3

Brrrr, I talk like M. Spock :hmm:

#4

Ha!

That would explain why killing them didn’t seem to harm my model.

#5

non-planar tris aren’t possible to my knowledge…

#6

I really don’t know how planeity is calculated by LW but that can be a reason.

#7

I have just checked with 3 aligned points… It is a tri and it is non-planar

#8

telamon is right, if you have 3 points that make up a triangle and any 2 points have the same xyz coords, then LW will say it is nonplanar. Merge points, then delete any resulting 1 and 2 point polys or use stats to select only the nonplanars, delete them then merge points. I have run into this in the past too, a bit puzzling at first.

edit: looking at telamon’s image, it looks like you don’t even need 2 points to share the same location, they just need to be co-linear. I don’t know what the quickest way to clean those up would be. Subpatching it would help though, as it would make any holes very obvious.

#9

Ah thanks dudes, that totally makes sense.

#10

Heh, odd stuff

Reminds me of 3 point quads…

#11

i managed to get nonplanars with a mesh of only tris aswell. it happened after accidentally smothshifting some polys without pulling them out which gave me a ring of nonplanars, as i then trippled my model there were only tris in the info box but still a bunch of nonplanars. what i did was selecting them and deleting but then i had to press m for merging the separated pieces back together. it was weired thou.

:surprised

#12

Telamon is always right

#13

no god please no… I am more often wrong… I am still a newbie…

The ones who are so often right are Splinegod, Kretin, Insider, FacialDeluxe, Kvaalen, LFGabel, Leigh, Proton, HowardM, MikeRB and sooooo many others

#14

Ya forgot me!

#15

oups sorry

nanogator is also a king… in slider-based techniques

#16

Doesn’t the flatness limit have something to do with what is considered planar and non planar? I believe it’s in the general options.

#17

Originally posted by Qslugs
Doesn’t the flatness limit have something to do with what is considered planar and non planar? I believe it’s in the general options.

Kinda curious about this myself. I’d love to hear from anybody who has an interesting anecdote about playing with that feature of LW.

#18

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