| Hi Mauro, 
> so i'm working on a model by a complex pattern flowed 
> on a revolved solid (i'll post soon..) 
> i got compression on the pole areas and i hope next beta 
> can solve this distorsion
 
The surface-to-surface mapping Flow will just follow the structure of the target surface.
 
So if there is compression in the target surface's structure like there is with a default sphere then that causes compression of the pattern.
 
If you want to avoid that, you would need to work with a surface that does not compress its top or bottom areas to a single point which is what a default sphere surface will do.
 
Maybe you need to use a rounded surface dome that is constructed in a different way than a sphere, something like a sweep of a profile and a rail like this:
     
   - Michael |