Some particles collision didn't work.

[annlee]

Hello~guys.
Here is my project. 
I want to make coin collect in the noise ground.
But some coin is through out the ground.
How do I fix this situation.
Thank you for your help~

[d4rk3lf]

If the coins are fast, in your Tyflow icon, go to the main settings, and increase "time step" parameter to 1/4, 1/8, or whatever works. 

If that doesn't help, and if your using PhysX, increase substeps from 4 to higher number, or if you're using particles, increase particle steps.

[annlee]

Thank you very much.
It's better now. There was not through out particle anymore.