My particle system (were all the particles basically look the same and are the same size) currently uses one vertex buffer with 4 vertices and i draw each particle one at a time... an alternative to that is to make 4 vertices in the vertex buffer for every particle and just draw them all at once... but sence they are billboards i would have to change the positions of the vertices with every frame so here is my question: is it faster to just draw the same particle over and over or is it faster to edit the vertex buffer with every frame? It just seems to me that if i have a lot of particles it may just be faster to draw them one at a time... but it also seems that more experienced programmers avoid using DrawPrimitive too much like its the worst thing you could possible do