Hi Michael,

Thanks for the tips! I do indeed use an Nvidia videocard and after disabling the thread-thingy :) the weird behaviour of Moi is finally gone!
By the way, after changing the ini-file like you described, there was an improvement in performance also, except all objects were rendered completely black instead of black lines and grey (or other)-colored sides.

Thanks for the support and keep up the good work - (Illustrator-export with hidden lines, pretty please...)!

Bart