Dickrnlds

Thanks Chopsaw and Dermot.

The same issue has just occured on another computer in my office.

I will investigate.

Thank you for rummaging about in my model!

I had wondered about the strange lighting / shadows!

Know about the "z-fighting thanks.

Seems the more fussy the program gets, the harder it is to nail down these issues. 

I sort of miss the simplicity of Chief 6 or 7.

Thanks guys. I will chase up the video card. Don't suppose Chief is "backclipping?

Here is the plan file.Westerink-Gould 5.plan

Westerink-Gould_5.plan

Has anyone seen this before? Causing a few issues with our presentations!