I'm afraid I can't save as I'm using the demo! But thanks anyway.

I think the problem is related to volumetric lighting, even at highest AA and volumetric light quality settings. I've tried with sun lights and the problems are not nearly so pronounced.

I've found these jagged artefacts in a range of different settings where volumetric light has been used - the worst was the one shown here.

I hope this has improved in Vue 6!

Thanks
Richard