Hello , i'm french ! I've just finished to read your article 6 on nehe page . I've made a particle engine like you said and like the tuto. ( lesson 19 ) . But i have a problem , because i want to display in the same time 2 differents things . I want for example a rain cloud on the left of the screen and in the same time , a water fontain near the ground . It's sounds very easy....but i don't know why, if the cloud is on , the fontain is off . The best thing will be to do just on particle engine for that , i tried to make 2 different ...it's not very good.... can you help me please ? If you don't understand what i mean ...tell me ! Thank you !

It would be very helpfull if you post your code.
Then we can help you find it

Please don't cross post, choose 1 spot so all replies can build off each other.