[Dave Seidman]

Here’s a simpler version you can use for a simple page turn effect:

Put the Blend effect on the “Front” of the page, add a rotationY key and tween it from 0 to 180. The “Back” of the page just needs to be in the comp as an invisible layer (also doesn’t need to be 3D or have motion blur turned on). In the Blend effect set the Blend with Layer to the “Back” page and add the expression below to the Blend With Original parameter.

If you want to get fancy add a Mesh Warp with a 2×2 grid and bend one of the corners and keyframe the distortion mesh so it looks like the page is being pulled by hand.

if(rotationY > 90) { 0 }
else { 100 }