This is a workaround solution for the anchor point issue.
As an example, to create an anchor point for the Basic 3d filter on the left side of a graphic, do the following:
1. Create a square.
2. duplicate the square (both are on same layer).
3. Set X scale on the duplicate to 200%.
4. Make sure the 100% graphic is above the 200% graphic on the layer.
5. Snap the original square (using dynamic guides) to the right half of the 200% graphic.
6. Turn off visibility of the 200% graphic.
7. Drop the Basic 3d filter on the parent layer (not on either graphic).
8. Animate Y Rotation of the Basic 3d filter to make your square spin around like a flag on a pole.
-Sean