Thanks for your answer. In fact, It was 3 identical points in final pixel coordinates, but 3 different points in vec(x,y,z).
I need this because I must not loose any data information when displaying critical information. For now, I have a workaround using Geometry Shader to make sure my triangles are at least more than one pixel size at any distance.
Is there any time frame for this extension to be release ? Will it be supported by the E8860 card ?
Thanks,
Tof