Hi Brian,

Ok, sorry for that one - never type something where you are half asleep.

i am trying to get a perfect (in away) round thread, or if you prefer the right curve that follow the tire.

So what i did was to use my tire, projected the thread on it, then use 2 planes and i rotated them so i have a 12 degree piece of the tire with the thread being cut so when you array (cirle) your 12 degree pieces. (only need 30 to do the 360 degree) that way i was certain that the thread that need to continue (the ones that are doing a full 360) would be fitting correctly.

But while doing this i found with Carrara 6 Pro i have 12 Degree banding on the render. So what i did his to have only the thread in the array and redid a revolve for the tire, but the thread still show the banding. (banding showing because of the light reflected).

I will if i can tonight, put some image to show what i did.

Cold

PS: I will try to have at least the 2 softwares that render have the similar setup to really give the difference. I just need to verify when i export to OBJ what carrara can do to import better or play with a setting.