Very strange behavior here. Sparkle copies 1 initial particle several times. It shouldn't happen.
Take a look at the example and copy-paste the stack into original wz4. There it behaves fine.

In fact, this is what causes it:
https://github.com/wzman/werkkzeug4CE/c ... 803e27099e
wz4/wz4frlib/fxparticle.cpp,

Replace p->Init(s->Pos+s->Speed*t+g*t*t,t) with p->Init(s->Pos+s->Speed*t+g*t*t,tt) and everything returns to normal.
I just wonder if this 'fix' is harmless for the rest of the code...

Yes it is a good fix.
It seems to be a mistake when I commited this modif.
I updated the fix.
Thanks.

Fine. Thanks.