Originally posted by nowonder
why the resulted boolean operation for this quite same 2 objects is different?
It creates a hole through the solid object it thinks you have.
Look at the first picture, the "insides" of the object is inbetween the two layers of faces.
Look at the second picture, the "insides" of the object is the entire diameter.
So for the first boolean it cut out inbetween both cylinders.
The second it cut straight through the single cylinder.
Think of it this way
Maya thinks the double-layered cylinder is hollow... and thus you can't drill through air so it only places holes on the "non-hollow" parts. The second cylinder is considered "non-hollow" thus its drilled straight through.
Why is the first cylinder hollow?
Because you created an internal cylinder which tells Maya "Hey! Inside me's just air!"
It gets more complicated how Maya decides what's inside and outside... but you'll figure it out as you go.
Last edited by Phopojijo; 31-10-2005 at 11:14 PM.