edelta CPE UFLIC
There appears to be something wrong with generating the CPE.

Thoughts: Not many at the moment.
256 for the primary grid 8,8,8 for the sub-grid
If I set primary grid above 512, I start getting stripes as well.

This is with primary set to 768 and the sub-grid set to (1,1,1).

This is with primary set to 1024 and the sub-grid set to (1,1,1).

This is with primary set to 1024 and the sub-grid set to (2,2,2).
Other than this, it actually looks okay.