Embergen Particles in Octane

[snooz]

Hi Guys !
I'm looking for a solution to use my attribute from particles.
I use geometry particle and i can show my attribut (age, velocity, size) but when i use the "instance color" node i only get the velocity map (in color not rgb)

First, how i can use motion blur with my vertex color ? Octane allow only vertex map (so how to split them into x,y,z channel)
Second, how to use age or size attribut.

I checked also with alembic particles import. I see my attribut in channel, but when i call an "attribute" node and pick age or size. Nothing append.

Do you have any ideas ?

Thx