Fuzz on 3D rotate after using index-1 expression

[shannontowell_sp]

I'm creating an animation of a rotating diamond following this tutorial: https://www.youtube.com/watch?v=Rp5kvSCaeOU

I have the diamond as a component, and then used the index-1 expression on the Z Position. Duplicated the diamond to get the thickness and parented them to a null. When I rotate the null there is a weird feathery look when it rotates at a certain angle.  I have tried clearing cache and preview options. I'm at a loss, any assistance would be appreciated. 

[Mylenium]

Nothing wrong here. It's how AE's old standard 3D renderer works. At certain angles you get undersampling where to many samples end up showing the wrong values. It's a precision issue and you can do nothing about it. If you need a more solid appearance, you have to use a genuine extrusion with the Cinema 4D renderer. Other than that it's usually not much of a problem, as motion blur and so on will disguise these artifacts further and of course you should only use fast and short moves with this fake technique, anyway.

Mylenium

[shannontowell_sp]

When I have done this tutorial before using circles I did not run into this issue, whilst I am learning Cinema 4D and could achieve this. I was hoping to use AE as it worked well previously, and the solid vector look is what I am after. Thanks.