I have the following 3x3 square plane. I made a cluster (see Fig. #1) with 8 vertices and tried to rotate it along a static point by 90 degrees. I also made another cluster (see Fig. #2) with 4...

What I want to do first is to prevent the flap A crossing the flap B, i.e., the rotation just stop when it touches the flap B even though a larger rotation is given to it.

In other words, I want...

I have a paper folded to make two flaps A and B.

If I rotate the flap A a little more, then It will just pass through the flap B.

I want to make the paper more realistic so that it pushes the...

I tried skeleton method and it gives the same issue.

I think the only way to avoid this problem is to give a some kind constraints.

Joints are not for multi-fold. It is very limited.

The answer is: samplerInfo1.flippedNormal->condition1.firstTerm.

It just check if the paper is flipped or not and depending on this state, a shader is chosen.

This works flawlessly.

There is no flipping of color. As you said it, it is the intrinsic problem of geometry interpenetration when you apply multi-folding of paper.

Nobody has a solution for this problem?

I just found out that the normals are o.k. The problem is starting at 90 degrees, the left layer sticks out of

the right layer. This is clearly shown on attached figs when I increased the...

The problem takes place when the rotation is exactly at 90 degrees. Somehow the upper part of the face normal flipped to show the backside shader (Fig. F). The face normal of the other side was also...

I am trying to simulate paper folding using cluster deformer. It is a simple setup.
At first I applied a diagonal fold to my mesh with less than 180 degree to avoid overlapping and then delete...