   Point Sprites
  I'm having a couple of problems with point sprites that im using for a particle system. First is that I have got an alpha mapped texture on them and they blend as expected but ignore the alpha from the color part of the vertex buffer. Even though they do use the actual color itself. For example I want my sprites to fade over time, but they stay the same even though im changing the alpha value.Second, is there anyway to have the point sprites not scale with distance from the camera. At the moment if the camera is close to the sprites they shrink but this doesnt work for the effect im working on. Is there anyway to tell directx that the D3DFVF_PSIZE is world space and not screen space of something like that?Thanks   
  Ive managed to sort out the alpha problem, was using the wrong state >.>  however the problem with them scaling seems to be the hardware on my computer hadeling point sprites differently. On anouther computer the sprites were rendering fine. Is there anything i can do or am i stuck with this because its a driver/hardware problem?   ;Quote:Original post by LaccolithSecond, is there anyway to have the point sprites not scale with distance from the camera. At the moment if the camera is close to the sprites they shrink but this doesnt work for the effect im working on. Is there anyway to tell directx that the D3DFVF_PSIZE is world space and not screen space of something like that?"Point size is determined by D3DRS_POINTSCALEENABLE. If this value is set to FALSE, the application-specified point size is used as the screen-space (post-transformed) size. Vertices that are passed to Direct3D in screen space do not have point sizes computed; the specified point size is interpreted as screen-space size.If D3DRS_POINTSCALEENABLE is TRUE, Direct3D computes the screen-space point size according to the following formula. The application-specified point size is expressed in camera space units."You will find all infos about pointsprites in Dx Sdk Doc.   ;  Yes, I read that and it turn't out after trying it on another computer that my computer was still shrinking the point sprites at close range while the other computer rendered them how I had set them up too. As can be seen from these pictures:Shrinking close to the camera as seen on my computerRendering normally as seen on my laptopWhat would cause this sort of problem?   