a small picture worths more than words... it often/always happen with some kind of props or figures (those especially made of primitives, or in some modelling softwares), when i turn the cartoon with line mode (need for anime doll renders) i have also bugs related to prop 3d modellign but it is not same bug in the meaning of the word.. but THIS: whenever i change slightly the camera angle it can dissapear, be less visible or fully waste the picture...

interesting....ive used cartoon w/line but so far nothing like this has hapened....ill experiment and see if this happens on my machine....

I'm curious about this one also. It happens to me alot as well whenever I import an external object into Poser Pro and switch to cartoon w/line mode. It's very annoying to say the least.

Stay Focused.

it seems that it happens with simple geometry props or items.. i mean if the item was modeled otu of props or as a simple mesh with some 3d softwares with poor compatibility export features maybe. i saw a couch once, not made with primitive props, but with nasty lines that appeared on a clean surface. will post a picture of it.. it is "different" from THIs bug but sure cartoon with line behaves in a very specific way that seems to be very strict about 3d modelling :)