Quote - No improvement, cherokee69. I tried a change in how I sampled, and while it got a little better, it was still full of parallel sampling lines visible near the horizon, i.e. how you'd normally see them.

I'm going to have to come up with a very different virtual geometry. The math is beyond what I can work out in my head. I need to get out pencil and paper and derive the equations I need and it will not be easy. 

Last weekend was my daughter's high school graduation, so I didn't do that, and this week I have a pretty heavy work schedule.

I'll keep you posted. 

No problem. I know you'll figure it out when you have the time.