particle system will invisible (why ?? )

hi (my english is so bad !!! )
i created a GPU particle system but when particle system has Out of sight of the camera it will invisible !
i watched epic tutorial video and in this video tutor clicked on ‘Bounds’ and also ‘Fixed Set Bounds’ and this problem fixed for tutor but i can not fix my particle system in this way
please see picture
tutor’s particle :

my particle

Hi Orache,

Click in the black area beside the module. You will have access to overall properties for the Particle system.

Locate the tab that says Bounds > and you can set the size of the bounds manually to fit the particle size.


thanks for your answer :smiley: