Usually I’m pretty careful about face orientation. I minutely inspect a new drawing to ensure the faces aren’t reversed. It’s always possible some tiny, hard-to-see face may slip through the cracks, but usually I get them all. So it was a surprise to say the least when I inadvertently deleted all my…

The cannon itself is 5 Gb as I remember (though I don’t know how that’s possible, but that’s what the author said) Heh, yeah, about that. I was exaggerating a little. Actually, a lot. :grin: The complete vehicle model weighs in at around 100 MB. That includes turret and hull exterior and interio…

[image] anon91144253: I was exaggerating a little. I thought so

[image] anon91144253: The complete vehicle model weighs in at around 100 MB So WeTransfer or Google Drive should be no problem to share your model… As said many times before that’s the only way to get to the bottom of this…

It added to the draaaaaamaaaaa. :laughing:

It’s in no way a big deal. Even the renders don’t seem to have been impacted by reversed faces. If they were/are I’ve not even noticed. :laughing:

Most renderers ignore back sides of faces. So if you are seeing no effect from reversed faces you made a fortunate choice of renderer.

Do you mean they don’t see it/won’t render it, or that they ignore the fact the face is reversed and render it as normal? I’m using V-Ray, and so far as I can tell have never had a face not render (properly) if it was reversed, or even for any reason. It seems to be a pretty forgiving renderer, act…

[image] anon91144253: Do you mean they don’t see it/won’t render it, or that they ignore the fact the face is reversed and render it as normal? I mean that they don’t render the back side of a face. They assume that back sides are intended to be the interior of opaque solids, hence can be sk…

Hmmm. I’m certain I’ve never seen reversed face issues arising within my V-Ray renders. Maybe it defaults to treating reversed faces as normal ones?

Reversed faces in renders are one thing, and very annoying they can be, but it is a fundamental of how sketchup understands geometry. If you get it wrong it can wreck havoc. Here is a simple example. Two cubes with an internal cube, cut at an angle with a section for visual reference. The geometr…

The mystery of the suddenly reversed faces

SketchUp

ateliernab August 16, 2023, 10:19pm 65

Switching to MP, to avoid digressing further

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The mystery of the suddenly reversed faces

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