That's because I use raw-draw to render the particles, and I recommend you to do the same. 
But I understand that my tutorial is a lot of text (actually, it appears worse than it is, the design is just very tiny horizontally). Anyways, good luck.

But I understand that my tutorial is a lot of text (actually, it appears worse than it is, the design is just very tiny horizontally). Anyways, good luck.