Hi
Are there any docs that explain what Z Invert is
and why you would use it?
Is Zoffs still in Blender or did they remove it for
some reason?
What exactly is No V. Normal Flip?
What is it used for?
Thanks for any help!
Update!
I found Zoffs.
Duh! 
What exactly is No V. Normal Flip?
What is it used for?
Are there any docs that explain what Z Invert is
and why you would use it?
Anyone?
From the docs:
http://www.blender.org/modules/documentation/htmlII/
No V.Normal Flip
Because Blender normally renders double-sided, the direction of the normal (towards the front or the back) is automatically corrected during rendering. This option turns this automatic correction off, allowing âsmoothâ rendering with faces that have sharp angles (smaller than 100 degrees). Be sure the face normals are set consistently in the same direction (CTRL-N in EditMode).
Zinvert
The Material is rendered with an inverse Zbuffer method; front and back are switched.
%<
Zinvert was used to make esher pictures
Zoffs was used to render 2d characters in 3d scenes without their feet disapearing in the floor
No Normal Flip was used to cut spheres in half without effecting the smooth settings.
Three points to elaborate on, please? :-?
To âthe initiated,â such as yourself, these three cryptic answers probably make perfect sense. To the rest of us mortals, itâs something we obviously ought to know. But since we donât, can you enlighten us with a short paragraph (and/or URL-reference) on just what you mean in each case?
Donât be rude.
1
Type âEscherâ in Google and see what you get. Then imagine trying to do that in 3D.
2
Make a floor plane. Angle it.
Make a plane that would be used to composite an image of a 2D character.
Place the center of the characterâs feet on the floor. Imagine the clipping problems.
3
Why are mesh spheres round? What happens to the normals when you cut one?
You should know better.
Three points to elaborate on, please? :-?
To âthe initiated,â such as yourself, these three cryptic answers probably make perfect sense. To the rest of us mortals, itâs something we obviously ought to know. But since we donât, can you enlighten us with a short paragraph (and/or URL-reference) on just what you mean in each case?[/quote]
Sorry 'bout that, just some background info I try to share.
Duoas explains it perfect.
Thank you!
Somehow I seriously doubt that Zinvert was made to honor Escher : what was the real intention for having it ?
Jean
Who said anything about honor Jean? Reread the posts, the answer is there.
I did say it.
And I did read this thread and a couple of others on the same subject (âŚand the doc)
I know what it does, inverting the order of the Zbuffer but what I donât know is what motivated the implementation of the function. I donât think that it is a desire to make Escher effects though. Every example I read (optical illusions or toon shading) seems to be a side effect, not the reason to have Zinvert. I was just curious.
Jean
âI donât think that it is a desire to make Escher effects though.â
Are you calling me a liar?
Would you please explain the line of reasoning that led you to that conclusion ?
Jean
Would you please explain the line of reasoning that led you to that conclusion ?
No Iâd rather have an answer.
But here it goes anyway:
The Zinvert was implemented to make an Esher assignment.
I state it was implemented to make an Esher assignment
Duoas esplains itâs there to make Esher images. And I say heâs correct.
Then you âseriously doubt thatâ and âdonât think thatâ.
But I was around when the feature was implemented.
If I go into my archives I can even show the first image Ton made with Z-inv.
Thatâs my line of reasoning that led me to that conclusion.
Last I checked, I donât answer to people who think that I attacked them when I didnât. The day that I will feel that I have any time to loose and decide that it is worth attacking you (for some undoubtedly ridicoulous reasons, those being the only ones that can motivates attacks against complete strangers), you wonât have to ask if I did.
But here it goes anyway:
The Zinvert was implemented to make an Esher assignment.
I state it was implemented to make an Esher assignment
Duoas esplains itâs there to make Esher images.
Re-re-reading what Duoas said I canât conclude the way you did : he just says that Escher illusions wouldnât be possible without Zinvert, not that it was why it was implemented.
And I say heâs correct.
Then you âseriously doubt thatâ and âdonât think thatâ.
But I was around when the feature was implemented.
If I go into my archives I can even show the first image Ton made with Z-inv.
Well then, why donât you just answer to my doubts and show your sources. I wasnât there before version 1.80 so I canât say for sure. That is why I used the word âdoubtâ instead of making a clear affirmation.
Jean
Three points to elaborate on, please? :-?
sundisldvc4 I REALLY agree with you. I have been using blender since 1999 and i still get confused by some of the language in the manuals and in the tutorials. Coming here and asking questions sometimes does not help(sometimes it does though) becasue the âexpertsâ here know the answers but cannot explain them to other people well.
To âthe initiated,â such as yourself, these three cryptic answers probably make perfect sense. To the rest of us mortals, itâs something we obviously ought to know. But since we donât, can you enlighten us with a short paragraph (and/or URL-reference) on just what you mean in each case?[/quote]
Asking a person to show evidence to support an assertion which they have made, does not amount to calling that person a liar.
Even initially expressing some doubt about a personâs answer to some question does not itself necessarily insinuate that the person is wrong or that his answer is incorrect.
Challenging an answer does not have to mean challenging the intentions, knowledge or integrity of the person who gave the answer.
At best, it ought to be viewed as an opportunity for both parties to come to a better understanding of the truth concerning the question or issue under discussion.
How handy. Well then this conversation never took place.
Asking a person to show evidence to support an assertion which they have made, does not amount to calling that person a liar.
Then a simple ânoâ could do.
some doubt
some doubt???
So âI seriously doubtâ is french for some doubt ???
At best, it ought to be viewed as an opportunity for both parties to come to a better understanding of the truth concerning the question or issue under discussion.
I already know the truth, and did an attempt to share it. It was possible to understand for others and it didnât need to be challanged. There is to many challanging on these forums anyway. A friendly inquery was more on itâs place, not a seriuos doubt if you donât know where your talking about.