collision before touching surface

[Fabrice]

Hi
trying to make snow flakes falling on the surface of an object.

I use a collision operator and a bind operator afterward.
I set absolute radius of the collision to 0.0, no bounce, no friction...

Problem is :
some flakes stop a few cm before touching the surface of the collision object.
Even with TimeStep set to 1/32 frame.

What am I missing please?

(Tyflow 1.14)

[tyFlow]

Can't distill much from a description alone. Please post (or send) the scene file.

[Fabrice]

Can't distill much from a description alone. Please post (or send) the scene file.

You're right

But I found out :
the shape was a group of 4 differents flakes 
and I guess the group's pivot was used instead of each group's member local pivot
wich was generating a visual offset.

I now use the 4 flakes separatly as 4 shapes REF and it works fine!

[tyFlow]

That would do it!