Page Turn Animation

[katia]

Hello, I am working ON A PAGE TURN ANIMATION. MY issue is that I need to apply two different pictures on each side of the page and, since is not possible to apply them on a plane I switch on a polycube, but now the problem is that, when I run the animation the front of the page (in red) appear through the back (in yellow) and vice versa.How can I solve this?

[ptb]

actually it is possible to use a plane with different front / back.

http://www.highend3d.com/boards/index.php?showtopic=202813

QUOTE
you need to create a double sided shader. To do this, create a Sampler Info node and a Condition node. Connect Sampler Infos "flipped Normal" attribute to the Condition nodes "First Term" attribute.
Make two materials to connect to the Condition Node one for the newspaper texture and the other for the back side of the paper. Connect the two materials to the appropriate "Color1" and 'Color2" attributes of the Condition Node.

[katia]

thanks a lot for the quick answer.
But I still need your help:
I have easily connected the sampler info node to the condition node but now, if I create the material for the front of the page, I can't get to connect to the condition node as you wrote.
I can not find the color1 and color2 attribute but just "color true" and "color false"

Sorry for those, probably, silly question but I'm totally new on material and texturing.

Thanks for your help

Ciao
Pioggia

[ptb]

Don't take descriptions so strict literally...

"color 1" and 2 is supposed to be the true and false color...

the network works like this (in pseudocode):

if ( flipped normal is true ), then output colorIfTrue
else , output colorIfFalse

should look like this:

connected to a surface shader (only outputs the color (which is already shaded) without additoinal shading).

[katia]

Thank you very much, now it works perfectly
but now there is an other problem ......I try to explain, I am doing an animation of a book with the turning pages and now I have notice that during the animation some part of each page goes through the following page. I hope is clear !!!!
How can I avoid this. Can I solve with rigid bodies-collision, and if so could you explain me how to use them or point me to some tutorials?

Thank you very much again for your help.

To understand my problem I 'll give you the link of the tutorial
[url="http://www.highend3d.com/maya/tutorials/animating/266.html"]

[ptb]

if you're using 8.5 unlimited use ncloth instead, i don't think rigid bodies are such a good idea...

here's a complete alternative using ncloth:
http://area.autodesk.com/blogs/blog/7/blogpost/4969/

[katia]

WOW!!!! YOU ARE THE MAN.
That's fantastic, I will try to do this tutorial. Thank you very much for your help.