Motion Blur for TyMesher?

[lemo]

Hello,
I tried to apply the method but it didn't work for me. I probably did something wrong but I won't have motion blur on my tyCache mesh even if my particles do have velocity informations.

I'm using 3dsmax 2020 and vrayNext

Here is how my scene looks




render of the tyCache mesh :


render of the particles only : 


If any one has a solution for this, that would help me so much!