There is a way to “emulate” GL_DEPTH_CLAMP_NV extension on Ati cards ?

I did a search and it looks like it has been answered:;f=3;t=011367

But I think it is not sufficient to do what DEPTH_CLAMP_NV is doing.

You can use an infinite projection matrix to eliminate far plane clipping. That is often sufficient for hardware/drivers that do not support NV_depth_clamp.

What about the near plane?