A question about layers

[Filip Vandueren]

Try parenting two layers together that are very closely spaced,

other than that buena software makes a plugin called ‘flipside’ which does this, it is I think only included in the ‘depth cue’ suite of plug-ins.

[Mike Clasby]

Method 1.

If the two layers are layer 1 and 2, make them both 3D, then separate layer 2 less than 1 pixel in Z space (say .5) and parent 2 to 1. Sometimes this leaves a little fringing if the backside is darker than the front side, so the other alternative is below.

Method 2.

Again make the layers 3D, but leave them with the same exact position numbers, parent 2 to 1, and add these Opacity expressions to make the layer invisible when the camera is on it’s backside.

To layer 1.

a = toWorldVec([0,0,1]);
b = thisComp.layer(“Camera 1”).position – toWorld(anchor_point);
c = dot(a,b)/length(b);
if (c > 0) 0 else 100

Then this expression on the second layer down:

a = toWorldVec([0,0,1]);
b = thisComp.layer(“Camera 1”).position – toWorld(anchor_point);
c = dot(a,b)/length(b);
if (c < 0) 0 else 100 The only difference between the two is the direction of the > (or) < These are Dan expressions from earlier posts. If your looking to make a 3D Book, Serge has a beaut, here: https://www.nyc-visual.com/3D_Book_M.html

[Steve Roberts]

Sorry, but I can’t recommend the “flipside” plug.

If you move the layer too far off camera axis, the “backside” disappears. When I reported this bug, I received no reply from the developer.

I hope it has been fixed.

[Brian Charles]

Card Wipe might be a solution combined with the page turn.