> Are your meshes forming closed shapes? If a mesh forms a shaped surface without
> any back, any ray entering it get refracted and is considered traveling inside
> something with an ior of 1.2. Now, it encounter the second mesh, also having an
> ior of 1.2. So, the ior before and after the surface is the same resulting in no
> further refraction.

The meshes are not closed. Basically I started with a .OBJ file of the
Stanford Bunny. I then wrote a program that would remove the back of the
bunny, leaving me with only its front.

How could I fix this? Is there any command that allows me to work around
this?

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