So I ran into a peculiar problem while rendering my scene in cycles. I am creating an animation demonstrating what a mental object cut is (when an object is cut by a plane). The pictures below show the sequence of my animation.
The setup is as follows:
(1) The initial object in picture 1 is the object I cut with an ambient occlusion material. The cross-section is a separate object hidden from scene view and render (same material applied). The cutting plane has a transparency node mixed with the diffuse node, and I regulate the level of transparency in Mix Shaders node.
(3) At a certain point, I make the initial object invisible for the scene and render and toggle on the visibility of a pre-modeled cross-section object place right where the plane would actually cut the object.
Now, in render mode my animation looks good. But when I actually render it, it the first frame looks like this (compare it to the first picture in my post):
The same thing actually happens in Blender Internal (which I desperately turned to having tries other things).
What I've tried so far:
- Render visibility is keyframed on/off correctly for all objects(not only viewport visibility)
- Duplication is set to none
- Normals are set correctly on the initial object
- changing normals on the cutting plane did not help
- Blender Internal yields the same result
- Starting a project from scratch did not help
- After some manipulations with toggling the visibility on/off, I came to the conclusion that the what happens is that the plane actually visually cuts part of the initial object and what is shown in the render is the second part behind the plane.
So what's happening here? I'd be very grateful if anyone could offer some insights into this situation. I am attaching the link to my blend file.