Since i'm using managed directx, i'm not really sure if i should ask this here or in the .NET forum, so sorry if this is the wrong place. I'm using point sprties to render particles - the trouble is that i can't get them to scale at all. Based on the info i've read in the docs/found on the net, i've set the PointSpriteEnable and PointScaleEnable render states both to true and i've set the PointSizeMin, PointSizeMax and PointSize states to 1, 100 and 50 respectively. I've tried dozens of different values for PointScaleA, PointScaleB and PointScaleC - but no matter what i set, it draws every sprite at the exact size specified by PointSize (or at least that's how it seems) and nothing else regardless of camera distance. So, my questions: 1: Should i have set pointsize at all? 2: did i miss a state somewhere? 3: could the fact that i use a shader for the rendering be causing this problem? 4: should i simply not be using point sprites, is there a better way to get particles?

I suspected that the answer was going to be to drop the point sprites.. they seem to be a lot of trouble to work with.

Thanks for the info, i'll give it a go that way then.