Hello everyone, something weird is happening, 2 days ago I downloaded the Parallax Mapping sample from NVidia's DirectX10 SDK, the sample was pre-build so i just ran it. The effects are working fine except for silhouette effect:

http://i.imgur.com/Xr7xB.jpg

Recompiling the sample locally not helped. I posted this problem on NVidia forums and I was replied that the Sample works perfectly on other systems. I remember downloading this SDK somewhere in the past and everything worked fine. Other individual samples are also working fine with and without recompiling. Already update video driver but didn't help.

What could be the cause of this problem? Microsoft's HLSL compiler? Driver-Hardware compatibility?

I think you should check out your drivers and update them,if necessary.

You can check this more thoroughly by running the sample in the reference rasterizer. If it looks fine there, smells like a driver and/or hardware problem.

You are right, running perfectly on reference.

http://i.imgur.com/wLxfl.jpg