affine dot product depth replace on nv

we have been using nvidias affine dot product depth replace - great
feature - on a Ti4800 … now we tried to move the application to an
FX5900 Ultra … normal dot product depth replace is still working
fine … however when trying to use affine dot product depth replace
we can’t see our “real objects” in the scene anymore … deactivating
depth test shows that they are correctly drawn. just seems like the
depth buffer has the wrong values assigned …

when using glOrtho instead of gluPerspective the affine dot product
depth replace is working fine again …

Since the affine dot product replace provides some performance
advantages over the standard replace, we would like to continue to use
the affine “mode” with gluPerspective .

does anyone have an idea what we could do in order to?

maybe someone from nvidia might be intrested - feature works fine on Ti4800 and not on FX5900 Ultra

[This message has been edited by SergeVrt (edited 09-14-2003).]